Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
After some serieus listening and comparing to my cd transport I do not hear much of a difference anymore while before the difference was quite clear. So adding the external clock + reclocker seems to be a major improvement :-) It would be nice though to compare it to a non-modified SB3.. Hopefully I can get my hands on one to make the comparison :P -- tingtong5 tingtong5's Profile: http://forums.slimdevices.com/member.php?userid=9671 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list [EMAIL PROTECTED] http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
rblnr;190985 Wrote: > Actually, turns out Empirical does not do such a mod. Any other ideas > anyone? Actually, we do something along these lines. Not a word-clock, though. My newest layout of my Pace-Car reclocker will take I2S or S/PDIF as input from the SB3 (we can mod the I2S interface into it) and the Pace-Car will provide a master clock to the SB. The phase and jitter of the incoming signals are not critical since the data is FIFO buffered and reclocked. The Pace-Car automatically senses 16/44.1, 24/96 and 24/192 and adjusts the output clocks accordingly. The master clock to the SB can come from an internal Superclock4 or an external professional studio clock via 50 ohm SMA connector. I am working toward a tape-out of the new Pace-Car in about 1-2 weeks. The new Pace-Car should be available early summer. The Pace-Car output is I2S. It didn't make sense for use to have a S/PDIF output. It is counterproductive to reduce the jitter to inaudible levels and then add jitter back in with S/PDIF encoding/decoding. Therefore, it is compatible with several DAC's that we mod and sell that have the Empirical I2S interface, as well as the Perpetual P-3A DAC. Sorry if this sounds like an advertisement -- audioengr audioengr's Profile: http://forums.slimdevices.com/member.php?userid=8041 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list [EMAIL PROTECTED] http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
Jitterbug;193868 Wrote: > I set up Arta, but to be honest am fairly clueless about how to use it On the top row, there are several buttons. Select SPA (SPectrum Analyser). With the buttons on the right side of the display, use "Top" and "Range" to obtain 0 at the top of the display, and -140 at the bottom. With FrHigh and FrLow buttons, manage to have the Frequency scale between 10600 and 11400 Hz, with 11000 in the middle. There are a few drop down selection to check: ignore "Gen", set Fs to 96000, FFT to 131072, "Wind" to Kayser7, Avg to none. Then, connect your source to the sound card input, and hit the arrow like red button (next to SPA on the right) to start "record". Depending on levels and gains, you may need to do some calibration, in order to span the spectrum all over the display: the peak value should be close to 0dB. It's possible from the menu bar, "Setup", "Calibrate devices". It's a good idea too, to browse help, user manual, introduction. You may also want to test your soundcard, it's explained in the first topic under "Spectrum analyser". I use FastStone Capture to capture and save screens. Have fun! JLM -- jlmatrat jlmatrat's Profile: http://forums.slimdevices.com/member.php?userid=10656 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
Jitterbug;193678 Wrote: > > -I bypass the HCU04 and go directly to pin 42 on the XILINK. > I dare not to solder directly to the xilink :( Jitterbug;193678 Wrote: > > -Rather than using a 50R/25R voltage divider to get from the X03's 5V > to the needed 3.3V, I use a 100R resisitor from the clock signal to > ground on the SB2 end. BTW, for this to work you need to keep the > resistor leads very short. > I also used 100R parallel in order to get 3,3V, but kept the resistor on the XO3 side. Any advantages on moving it to the other side of the coax? Jitterbug;193678 Wrote: > > -I also take the SPDIF dirctly from the XILINK, so have take the hex > buffer completely out of the circuit - in fact right off the board. > } Again, I dare not do this, afraid to screw my sb3 up for good :( I also wonder though what the advantage is? [QUOTE=Jitterbug;193678 Next step is to slave the the X03 clock to XO-DAC clock on my DAC for synchronous reclocking. I house everything in one enclosure so am excited about what this csn produce in terms of jitter levels. Yep, my next step as well :P Please, keep us informed, very interesting. To be honest I do not hear much of an improvement yet... :P -- tingtong5 tingtong5's Profile: http://forums.slimdevices.com/member.php?userid=9671 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
I've been using the RAKK DAC for about a year and enjoy it a lot. Compared with the other DAC I own, the MF A32.24 I find it much more lifelike and engaging. One of the nice things about it is that it's built to tightly couple with Guido's XO-DAC. There is a MK 2 just out which does upsampling. I haven't heard it. I set up Arta, but to be honest am fairly clueless about how to use it - any tips on what settings I should be using to get a graph similiar to what you generated. I'm using an MAudio Audiophile sound card. -- Jitterbug Jitterbug's Profile: http://forums.slimdevices.com/member.php?userid=4955 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
Jitterbug;193735 Wrote: > I would also be concerned if I was going externally with the signal. > However, the SPDIF output is hardwired to the X03 which reclocks the > signal and sends it onward to a RAKK DACC, again hardwired. OK then, I was not getting the whole picture. Any comment or advice regarding the RAKK DAC will be of greatest interest, too. JLM -- jlmatrat jlmatrat's Profile: http://forums.slimdevices.com/member.php?userid=10656 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
jlmatrat;193721 Wrote: > Exposing the XILINX to the external world would make me nervous ;-) > It definetely may work, but there are a handful of other components > between the HCU04 and the S/PDIF jack, including a small resistor > useful to protect from accidental shorts on cables or jacks. > More, I'm not sure the Xilinx is able to provide enough current for a > clean signal: actually, from the Xilinx pin#3, the signal goes through > two buffers in parallel, followed by a capacitor, a resistor divider, > and a small inductor. There is another inductor in the ground leg of > the jack (on a SB2 these components are labeled C1, R2, R3, L5 and L1 > respectively, C1 being feed by HCU04 pins #10 an #12 tied together). > I'm afraid removing all these components could actually waste, if not > ruin, all the benefits of a better clock. > > Anyway, I'm very interested to see your test results! > > JLM I would also be concerned if I was going externally with the signal. However, the SPDIF output is hardwired to the X03 which reclocks the signal and sends it onward to a RAKK DACC, again hardwired. The RAKK DAC uses an input transformer (so no inductor needed I feel) and then a CS8416 which can accept full logic level signals (so no resistor divider needed in the cicuit either). I will post the results when I get a chance to do some proper listening and jitter tests -- Jitterbug Jitterbug's Profile: http://forums.slimdevices.com/member.php?userid=4955 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
Jitterbug;193678 Wrote: > I also take the SPDIF dirctly from the XILINK, so have take the hex > buffer completely out of the circuit - in fact right off the board. Exposing the XILINX to the external world would make me nervous ;-) It definetely may work, but there are a handful of other components between the HCU04 and the S/PDIF jack, including a small resistor useful to protect from accidental shorts on cables or jacks. More, I'm not sure the Xilinx is able to provide enough current for a clean signal: actually, from the Xilinx pin#3, the signal goes through two buffers in parallel, followed by a capacitor, a resistor divider, and a small inductor. There is another inductor in the ground leg of the jack (on a SB2 these components are labeled C1, R2, R3, L5 and L1 respectively, C1 being feed by HCU04 pins #10 an #12 tied together). I'm afraid removing all these components could actually waste all the benefits of a better clock. Anyway, I'm very interested to see your test results! JLM -- jlmatrat jlmatrat's Profile: http://forums.slimdevices.com/member.php?userid=10656 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
tingtong5;193218 Wrote: > My SB3 is running now on an external clock (XO3 module from Tentlabs). > Also the spdif output is relocked now before send to the DAC. > > Now I'll need some time to listen and to compare it to my cd transport. > First impression is that the differences between the two have gotten > smaller! Nice work. I've just done the same thing to a SB2 also with one of TentLabs X03 clocks, with a couple of minor differences: -I bypass the HCU04 and go directly to pin 42 on the XILINK. -Rather than using a 50R/25R voltage divider to get from the X03's 5V to the needed 3.3V, I use a 100R resisitor from the clock signal to ground on the SB2 end. BTW, for this to work you need to keep the resistor leads very short. -I also take the SPDIF dirctly from the XILINK, so have take the hex buffer completely out of the circuit - in fact right off the board. Next step is to slave the the X03 clock to XO-DAC clock on my DAC for synchronous reclocking. I house everything in one enclosure so am excited about what this csn produce in terms of jitter levels. Then I'll get setup to run that jitter analysis test jlmatrat suggested. -- Jitterbug Jitterbug's Profile: http://forums.slimdevices.com/member.php?userid=4955 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
Ah, the case-to-prevent-fall-apart. Very nice! I wasn't criticizing, BTW. I have no WAF to contend with. Right now I have computer parts strewn all over the hallway... -- Mark Lanctot Mark Lanctot's Profile: http://forums.slimdevices.com/member.php?userid=2071 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
Mark Lanctot;193293 Wrote: > The WAF must be through the roof on that mod! :-) Did something about that today. The new box also contains the 5V regulated power supply. +---+ |Filename: DSC02566.jpg | |Download: http://forums.slimdevices.com/attachment.php?attachmentid=2667| +---+ -- tingtong5 tingtong5's Profile: http://forums.slimdevices.com/member.php?userid=9671 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
Mark Lanctot;193293 Wrote: > The WAF must be through the roof on that mod! :-) FÖck the WAF! (literally) -- P Floding No, I didn't ABX it. And I won't even if you ask me. (Especially not if you ask me.) P Floding's Profile: http://forums.slimdevices.com/member.php?userid=2932 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
The WAF must be through the roof on that mod! :-) -- Mark Lanctot Mark Lanctot's Profile: http://forums.slimdevices.com/member.php?userid=2071 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
My SB3 is running now on an external clock. Also the spdif output is relocked now before send to the DAC. +---+ |Filename: DSC02562.jpg | |Download: http://forums.slimdevices.com/attachment.php?attachmentid=2660| +---+ -- tingtong5 tingtong5's Profile: http://forums.slimdevices.com/member.php?userid=9671 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
Very nice post! Thanks for going to the trouble. I haven't sent my stuff for the mods yet and I'll take your experiences into account. Mike -- miklorsmith miklorsmith's Profile: http://forums.slimdevices.com/member.php?userid=4349 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
Hi folks, I take the opportunity of reporting my own modest experience with clocks and SB. Actually, it's a SB2 I played with, so components references and pinout in the following may differ for a SB3. I elected a D-Clock from NewClassD, the new home for Lars Clausen, formerly at LCaudio. Advertised intrinsic jitter is a mere 1.5 ps. Small enough, I guess. So I ordered a 12.2896 MHz clock, keeping the 12.28 MHz part of the circuit untouched. The output of this clock is floating, using a pulse transformer. At first, I ried to connect the cable directly to pin#42 of the Xilinx, after cutting the trace between this pin and the pin#2 of the HCU04. My concern was not to use the crystal pad, as this one is fed through two successives gates before it gets to the Xilinx FPGA. And these gates are not free of any power supply noise, which is a well known cause of jitter. A convenient ground was found by inserting a short piece of thin component lead (from a signal diode, I think) in a via close to the Xilinx. Just peel of the varnish on the bottom side of the PCB, then gently scub the ground plane in order to make a good solder. After that, you get some kind of a robust pin to hook the cable shield to. Adequate power supply was obtained from the pins of the conspicuous big 3300µF cap in the vicinity. Alas, it didn't work: as reported by another member in this thread, no progression on the timing bar. I drop a line to Lars Clausen, and he was kind enough to answer back promptly. I followed his advice to go first through a gate of the HCU04, assuming that this device would be more compliant to the symetric, low voltage, clock output (actually, it's a +/-1.6V instead of a 3.3V). He added that the transitions of his clock are very sharp, and shouldn't be affected jitterwise by the HCU04. However, I decided to keep the gate count as low as possible: no more than one! So I connected the clock cable to pin#1 of the HCU04, actually using one of the pads of the previously removed 12.2896 MHz crystal. Of course, I repaired the previously cut trace between the output of this gate (pin #2) and Xilinx pin#42. This setup works perfectly now. In order to get clean of unwanted signals, I removed also the caps C6 and C15 (the small companions of the crystal) and, as a final touch, I lift up the pins #3 and #4 of the HCU04, effectively removing of the circuit the Pierce oscillator gate. Doing this, I'm pretty sure there is no other component involved in the path of the clock output. Oh, yes, one end of the resistor R1 (the one paralelling the crystal) is still connected to it... but the other end is now floating around, so it shouldn't hurt. This is for my story: I hope it will be helpful for somebody. Well, now it works, and well, but does it worth the expense? If using the analog out of the SB, maybe yes, assuming you also do your homework on power supply and the like. But if you go for a first class external DAC, and in my humble opinion: no. Last month, I purchased a Lavry DA10, and, as I also own an untouched SB3, I set up some comparison, one SB using the Toslink, and the other the coax: the Lavry allows for a convenient switching between these inputs. I felt unable to tell a difference. I exchanged the connection, too, in order to eliminate possible difference in electrical vs. optical interface. I made some spectrum analysis, using the sound pattern from Julian Dunn, and I must say there is some improvement in the picture for the reclocked SB2 over the stock SB3. All well below the -130 dB theshold. Hardly audible. As a matter of fact, I'm wondering if the guys at Slimdevices didn't do some fine tuning in the SB3 over the SB2, with improved PCB layout, or different components, I don't know, but my feeling is that the SB3 is slightly better than the SB2, regarding jitter (I didn't pay much attention to analog output, however). So this is my (not so humble) advice: don't bother modding the SB3. Just buy a decent DAC. The Lavry DA10 is a dream, BTW. JLM -- jlmatrat jlmatrat's Profile: http://forums.slimdevices.com/member.php?userid=10656 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
Perfect. Thanks John! -- RioTubes RioTubes's Profile: http://forums.slimdevices.com/member.php?userid=10172 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
OK, here is a link to the full sized version. http://johnswenson1.home.comcast.net/stereo/SBI2S.gif I hope this is more readable. John S. -- JohnSwenson JohnSwenson's Profile: http://forums.slimdevices.com/member.php?userid=5974 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
Soon I will try again. This time I want to do it right so I also ordered a XO3 module from Tentlabs and use that instead of my self build version.. Advantage of that is that can also reclock the spdif output from the SB3 before it goes to the DAC. A more expensive solution but with a higher chance of succes. To avoid misunderstandings: I'm purely talking about building a proper external low jitter clock for SB3. No slaving from the DAC yet. -- tingtong5 tingtong5's Profile: http://forums.slimdevices.com/member.php?userid=9671 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
Fantastic! You are very generous John. Having a little difficulty reading the small font for component ID on the schematic. Would it be possible to post a file attachment or send pm? Thanks, Mike -- RioTubes RioTubes's Profile: http://forums.slimdevices.com/member.php?userid=10172 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
Here's a schematic I drew up for someone else doing exactly the same thing. Note I have not actually implemented exactly this schematic, in my DAC I'm using an FPGA to do the converting etc, but this SHOULD work, I've simulated this and it does the right thing. Note the circuit for shfting the data from left justified to I2S is a little complicated, this is to make sure that you don't have a race condition at the input to the DAC. The basic concept is the data gets clocked by the bclk which shifts it over by one so its I2S spec. What this does is clock data by the reclocked bclk, then clock it again by a reclocked inverted bclk, then the output is reclocked again. The net result is that the delayed data has exactly the same timing in relation to the other signals as the original data has, thus almost guranteeing you won't have a timing problem. The voltage conversion is done with HC logic run off 3.3V, since its 5V tolerent it works fine with this. In this cicuit I've specified the Tent 5V shunt regulator to run everything except the inverters driving the SB3. You certainly can use another regulator, but using the Tent makes this really easy, its hard to design your own regulator that will work as well as this and cost significantly less. Note I'm using a 174 to do the actual reclocking, this flies in the face all the conventional wisdom, there IS a reason for that. It depends on how you are building this. If you are using a PC board with SMD parts the best way is the "pico gate" single gate chips, these work wonderfully well for this. If you are using through hole parts and hand soldering things up I personally think the 174 is a better compromise. Because the DIP chips are so much larger they have much more capacitance and inductance on their package pins, using 4 or five of these will degrade the clock driving all of them worse than the jitter inside the one chip. Using 74s with both flops used is also not bad, thats kind of a wash with the 174. I definately would not use DIP 74s and only one flop per package, that sounds worse than a 174. I hope this helps. I definately think its worth the effort to get this up and running. John S. +---+ |Filename: SB12S.jpg| |Download: http://forums.slimdevices.com/attachment.php?attachmentid=2612| +---+ -- JohnSwenson JohnSwenson's Profile: http://forums.slimdevices.com/member.php?userid=5974 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
Thanks for chiming in John. After considering your prior feedback and reading up on synch reclocking I've managed to create a schematic which is attached. Does it look like it might work? The right side (i.e. my external DAC schematic) is fortunately all done. I just need to create a resynch board with the Tent mlck and DFlops and reg psu. The last piece of the puzzle (I'm stumped!) is I know the schematic is missing 1 Dflop that is required to take the SB3 Left Justified Sig and convert it to pure philips I2S (I have tda1541 twin dac chips..though unbalanced). Any guidance on the input, clock and output for this add'l flop? Also, I don't know if I NEED all 4 flops...I read posts by Jocko and Guido stating always better to use only 1 input per flop. +---+ |Filename: Synchronous Reclocker.pdf| |Download: http://forums.slimdevices.com/attachment.php?attachmentid=2610| +---+ -- RioTubes RioTubes's Profile: http://forums.slimdevices.com/member.php?userid=10172 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
Oops, I didn't answer Rio's question. As long as you are doing the reclocking in the DAC the jitter in the SB doesn't matter much. This means you can use horrible transmission technology to get the MCLK into the SB and as long as it can see some vestige of a square wave it will work fine. My first attempts at this just used a simple piece of ribbon cable about two feet long with no termination or impedance control at all. I just used a 74HC08 (I had one on hand) to buffer the signal to the SB so the horrendous reflections etc on the cable wouldn't be affecting the clock inside the DAC. Even with that very bad signal the SB took the clock just fine and the analog outs even sounded better. That surprised me, I was expecting that the simple connection would introduce more jitter than the internal crystal. It sounds like even so it was lower jitter anyway. John S. -- JohnSwenson JohnSwenson's Profile: http://forums.slimdevices.com/member.php?userid=5974 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
So how did it work? Do you have the SB playing off the external clock? BTW I want to clear up some terminology here, there seems to be some misunderstanding between "word clock" and MCLK or sysclk. A word clock is a clock with a frequency equal to the sample rate (a "word" in this case is all the bits, both left and right channels for one sample), in this case 44.1 KHz. MCLK (or master clock) is 256 times the word clock or 11.2896 MHz. The "bit clock" is 1/4 of the MCLK. This technique of feeding a clock into a pad where the crystal used to be HAS to be MCLK NOT a word clock. So if you have a DAC that outputs a clock it has to be a MCLK not a word clock. OR you have to do what Sean mentioned and use a PLL to multiply the word clock 256X to make a MCLK. As far as the jitter goes inside the SB itself the clock multiplication would almost certainly produce more jitter than is already there with the existing crystal, BUT it would allow you to sync the SB to the clock inside the DAC. As long as the DAC is synchronously reclocking the incoming data with its own internal low jitter MCLK this might actually be a usable solution. This scenario would only come into play if you had a DAC which reclocks with its own internal low jitter clock AND outputs only a word clock (not MCLK), AND you don't want to modify the DAC to get at the MCLK. In this case the only choice for syncing the SB would be a PLL clock multiplier on the word clock from the DAC. (it would be a LOT easier to just grab the MCLK but you have to modify the DAC if you want to that). As has been mentioned already, once you do the external modification you cannot run the SB on its own, the MCLK from the external source HAS to be running for the SB to operate correctly. If this clock is not running when the SB boots up it can get in some really bizzare modes where the data stream gets out of sync with the LRCLK. (don't ask how I know about that!) Then there is the issue of 48/44.1. If you do this for just 11.2896, you have the synchronous reclocking for 44.1, but not for 48, if you ever feed 48 source into the SB you will need some method for telling the DAC to not run in synchronous reclocking mode. I've actually dealt with this by having both 11.2896 and 12.288 clocks on the DAC and sending both to the SB, then sending the MCLK going to the SB's DAC chip to my DAC. The FPGA in the DAC then figures out which one the SB is using and selects the right clock to send to the reclocker. This works very well but is some what complicated. John S. -- JohnSwenson JohnSwenson's Profile: http://forums.slimdevices.com/member.php?userid=5974 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
Actually, turns out Empirical does not do such a mod. Any other ideas anyone? -- rblnr rblnr's Profile: http://forums.slimdevices.com/member.php?userid=4504 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
Thanks Rio. -- rblnr rblnr's Profile: http://forums.slimdevices.com/member.php?userid=4504 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
rblnr, empirical audio can do this. Steve Nugent. http://www.empiricalaudio.com/ -- RioTubes RioTubes's Profile: http://forums.slimdevices.com/member.php?userid=10172 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
Can anybody point me toward a modder who can add a word clock input to my SB3? Want to use it w/the word clock out of my EMM Dac2SE. Thanks. -- rblnr rblnr's Profile: http://forums.slimdevices.com/member.php?userid=4504 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
Ronald, I'm thinking of doing the same...synchronous reclocking using the mclk in the Dac...following John S's lead. Are you buffering the mclk output out of the dac? I'm trying to assess how critical this is. I'm thinking of placing an SB3 board inside my dac to keep the cable as short as possible. How did you reduce the mclk from 5V to 3.3V? Mike -- RioTubes RioTubes's Profile: http://forums.slimdevices.com/member.php?userid=10172 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
tingtong5;190496 Wrote: > So I guess I need to try again and do it the right way this time :P > > Now I have to find a good ground reference point on the circuit board > somewhere near the "pad" which serves as the external clock input.. The small caps on either side of the crystal are connected to ground. That's your best bet although it's kind of a small thing to solder onto. -- seanadams seanadams's Profile: http://forums.slimdevices.com/member.php?userid=3 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
AndyC_772;190497 Wrote: > One of us is missing something here... you need to connect the screen of > the coax cable to ground at BOTH ends. > > edit: I see you noticed that 2 minutes ago... ;) Yes I am aware of this now :P The ground of the external clockboard was connected to the ground of the SB3, but not in the proper way.. -- tingtong5 tingtong5's Profile: http://forums.slimdevices.com/member.php?userid=9671 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
One of us is missing something here... you need to connect the screen of the coax cable to ground at BOTH ends. edit: I see you noticed that 2 minutes ago... ;) -- AndyC_772 AndyC_772's Profile: http://forums.slimdevices.com/member.php?userid=10472 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
So I guess I need to try again and do it the right way this time :P Now I have to find a good ground reference point on the circuit board somewhere near the "pad" which serves as the external clock input.. -- tingtong5 tingtong5's Profile: http://forums.slimdevices.com/member.php?userid=9671 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
seanadams;190475 Wrote: > Where exactly? I see only heat shrink tubing around the sleeve of that > coax where it connects to the pcb. > > Have you got a scope? The shrink tubing is there to isolate the shield from the SB3's smd component. I connected a ground wire to the other end of the coax which I think was a mistake.. Yes I do have a scope, though it is a 10 MHz one.. The clock looks more like a sine wave then a square wave but I assumed this is because of the scope's limits in being able to display frequencies > 10 MHz.. -- tingtong5 tingtong5's Profile: http://forums.slimdevices.com/member.php?userid=9671 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
RioTubes;190474 Wrote: > Ronald, the pic is to small to tell if you connected the clock input > cable's ground to a handy clock reference point on the SB3 board? Well that might have been my big mistake.. I used a wire to connect ground from one of the "rca output ground" to the "other end" of the coax cable's shield. I suppose this is a big sin since we are talking high frequencies here .. -- tingtong5 tingtong5's Profile: http://forums.slimdevices.com/member.php?userid=9671 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
tingtong5;190305 Wrote: > Yes I do... :P Where exactly? I see only heat shrink tubing around the sleeve of that coax where it connects to the pcb. Have you got a scope? -- seanadams seanadams's Profile: http://forums.slimdevices.com/member.php?userid=3 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
Ronald, the pic is to small to tell if you connected the clock input cable's ground to a handy clock reference point on the SB3 board? -- RioTubes RioTubes's Profile: http://forums.slimdevices.com/member.php?userid=10172 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
Patrick Dixon;190250 Wrote: > I can't quite see from you photos, but you do have a ground reference > between the SB3 and the tent clock board, don't you? Yes I do... :P -- tingtong5 tingtong5's Profile: http://forums.slimdevices.com/member.php?userid=9671 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
Please tell me that's an anti-static towel you're working on... ;) -- AndyC_772 AndyC_772's Profile: http://forums.slimdevices.com/member.php?userid=10472 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
I can't quite see from you photos, but you do have a ground reference between the SB3 and the tent clock board, don't you? -- Patrick Dixon www.at-tunes.co.uk Patrick Dixon's Profile: http://forums.slimdevices.com/member.php?userid=90 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
Last weekend I removed the 11,28 MHz crystal from the SB3 and tried an external Tentlabs clock (same frequency of couse and a level of 3,3V). By the way the blue coax is the spdif output, the black one is for external clock input. (the next step would be to slave the SB3 to the master clock in my Monica DAC, but first step was to test whether an external clock would work well or not..). And now the bad news, it didn't work Angry The time counter (now playing screen of the squeezebox) started running when connecting the external clock but Monica did not had a "lock". Then I tried to solder this external clock (only 3 cm of coax) directly to the SB3 board. Same story... But... When I accidently touched the ground of the external clock board that I build it suddenly did work! When I removed my finger again the DAC stayed locked for a few seconds and then lost lock again. I now have to find out why this happens. Any ideas? I must add, that I did NOT remove the 2 caps connected to the crystal pads. The reason I did not do this was simply that I would render the SB3 unusable if the external clock wouldn't work. For now I placed back a 11,28 MHz crystal and the SB3 is playing again. +---+ |Filename: DSC02547.jpg | |Download: http://forums.slimdevices.com/attachment.php?attachmentid=2596| +---+ -- tingtong5 tingtong5's Profile: http://forums.slimdevices.com/member.php?userid=9671 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
P Floding;189874 Wrote: > I assume you mean a wordclock input (or "clock input") to the SB3, and a > wordclock output from the DAC? Er yes sorry my total mistake - that is what I meant of course - sorry Sean! -- Phil Leigh Phil Leigh's Profile: http://forums.slimdevices.com/member.php?userid=85 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
Phil Leigh;189773 Wrote: > I was wondering how hard it is to add a wordclock out to the SB3 and a > wordclock in to my DAC (MF X-DACv3)...so that the DAC can slave to the > sb3 without relying on the SPDIF clock...anyone done anything like > this? - is it a DIY option? I assume you mean a wordclock input (or "clock input") to the SB3, and a wordclock output from the DAC? -- P Floding No, I didn't ABX it. And I won't even if you ask me. (Especially not if you ask me.) P Floding's Profile: http://forums.slimdevices.com/member.php?userid=2932 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
miklorsmith;189780 Wrote: > You can add a wordclock in to the SB3, but this is strictly a custom > operation for a modder. The clock chip in the SB is deactivated and > hardwired with a dedicated clock cable. > I suppose you mean a BIT clock? 11,28 MHz is a bit clock not a word clock :P -- tingtong5 tingtong5's Profile: http://forums.slimdevices.com/member.php?userid=9671 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
miklorsmith;189805 Wrote: > Well, the clock cable is hardwired into the SB as a wordclock in. My > DAC has a wordclock out, so the DAC is the clock "master". > > Lessloss is convinced this is The Way to go. The best I can > understand, having two competing clocks that don't mesh perfectly are a > big source of jitter. Having the clock as close as possible to the DAC > chip is a good thing. Don't quote me on it though, this is what I > distill from their statements. > > I should be able to compare the "ultimate" Lessloss solution vs. > Boulder Cable's "ultimate" standalone SB pretty soon, should be > interesting. Yes, I am intimately familiar with the concept. I was commenting on going the _other_ direction, which Phil asked about. -- seanadams seanadams's Profile: http://forums.slimdevices.com/member.php?userid=3 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
Well, the clock cable is hardwired into the SB as a wordclock in. My DAC has a wordclock out, so the DAC is the clock "master". Lessloss is convinced this is The Way to go. The best I can understand, having two competing clocks that don't mesh perfectly are a big source of jitter. Having the clock as close as possible to the DAC chip is a good thing. Don't quote me on it though, this is what I distill from their statements. I should be able to compare the "ultimate" Lessloss solution vs. Boulder Cable's "ultimate" standalone SB pretty soon, should be interesting. -- miklorsmith miklorsmith's Profile: http://forums.slimdevices.com/member.php?userid=4349 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
Phil Leigh;189773 Wrote: > I was wondering how hard it is to add a wordclock out to the SB3 and a > wordclock in to my DAC (MF X-DACv3)...so that the DAC can slave to the > sb3 without relying on the SPDIF clock...anyone done anything like > this? - is it a DIY option? I don't see how that would have any advantage over S/PDIF, in fact I expect it would be worse. To do that you need to generate an MCLK signal by multiplying the word clock by a factor 256. You have nearly all the same jitter components as s/pdif, but possibly even worse because you have to multiply up by such a large factor to a PLL-generated MCLK, and it is the MCLK that affects jitter, NOT LRCK. LRCK is effectively a data signal as far as any modern delta-sigma DAC is concerned. I just can't think of any practical use for feeding a word clock cable INTO a DAC. -- seanadams seanadams's Profile: http://forums.slimdevices.com/member.php?userid=3 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
You can add a wordclock in to the SB3, but this is strictly a custom operation for a modder. The clock chip in the SB is deactivated and hardwired with a dedicated clock cable. The downside of this is the SB will not run without an external clock signal and it will not operate analog-out. So, you'll NEED a DAC with clock output to be able to listen to the SB. If your DAC doesn't have a clock output, that's probably the bigger hurdle. I have a Lessloss DAC that has a clock output and I'm planning to convert the SB. But, the loss of SB flexibility has made me think long and hard about whether I want to do it. In the end, the sonic benefits (theoretical to me at this point) will probably win out and the SB could be converted back if needed. -- miklorsmith miklorsmith's Profile: http://forums.slimdevices.com/member.php?userid=4349 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
I was wondering how hard it is to add a wordclock out to the SB3 and a wordclock in to my DAC (MF X-DACv3)...so that the DAC can slave to the sb3 without relying on the SPDIF clock...anyone done anything like this? - is it a DIY option? -- Phil Leigh Phil Leigh's Profile: http://forums.slimdevices.com/member.php?userid=85 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
Hi Ronald, so it sounds like you want to get data out over the S/PDIF, but feed the clock in to the SB3. This should work fine. Taking a 74HC chip directly into a 75 ohm impedance is not a good idea, they are not designed for this. I would just leave the S/PDIF as is since you are reclocking the data in the DAC, getting the absolute lowest jitter possible out of the S/PDIF interface is not necessary. I've switched to using LVDS for sending data and clocks between boxes, it works amazingly well and radically cuts down on radiated crud from the wire. Good luck with the project, it should give you a significant improvement in sound. John S. -- JohnSwenson JohnSwenson's Profile: http://forums.slimdevices.com/member.php?userid=5974 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
Hi :-) I'm about trying the same thing. That is keeping the spdif but slaving the SB3's clock to my DAC. I already changed the spdif RCA connector for a BNC connector and bypassed the inductors. I would also like to take the spdif signal directly from the 74HCU04 since my DAC's spdif receiver can handle +/- 12V and would most certainly perform better when getting a signal higher then the standard 0,5V. However the impedance should still be 75 Ohm of course and my question is how to obtain that goal since there is no information about output impedance in the 74HCU04 datasheet :-( The DAC I use is self-made but based on the Monica 2 DAC from diyparadise. I will change its XO module from 80 MHz to a 11,28 MHz tentlabs XO and I will use this clock as the bitclock for the TDA1545 DAC chip (ignoring the reclocked spdif clock). This clock will be fed to the SB3 as well. By doing this the asynchronous reclocking (of data and wordclock) would then automatically become synchronous reclocking. I would have to attenuate the clock signal that goes to the SB3, since the tentlabs XO has a 5V output. I will use resistors for this. Regards, Ronald -- tingtong5 tingtong5's Profile: http://forums.slimdevices.com/member.php?userid=9671 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
Hey, I've looked around for photos of the SB3 motherboard. Does anybody know where I could find one? Also, does anybody know where I could get a schematic of the clock section so the DAC guy and installer can ensure they're optimizing the solution. Thanks for your help, fellas! Mike -- miklorsmith miklorsmith's Profile: http://forums.slimdevices.com/member.php?userid=4349 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
Thanks a bunch. The DAC does have a clock output and can output three frequencies. 11.28 mhz is one of them. I'm not sure about the voltage. Strangely, the Lessloss website goes into deal about the slaving process but doesn't specify the output voltage on the clock signal. I'll make sure to look into that. I'm planning to keep the S/PDIF interface since I don't want to hack the DAC any more than necessary. We will probably swap the RCA connector for a 75-ohm BNC but that'll probably be it. I'm not sure whether the signal is logic level or AC coupled. However, I'll be copying Vinnie with this thread who will be talking to Lessloss before performing the conversion. He probably knows the questions to ask, but this will jog his brain to make sure of success before starting. Thanks a lot, really. I have tremendous hopes for this solution. Mike -- miklorsmith miklorsmith's Profile: http://forums.slimdevices.com/member.php?userid=4349 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
If the DAC outputs the 11.2896 signal you should be able to feed it into the SB3. The SB3 takes a 3.3V logic signal so you either need that out of the DAC or a converter to get it to that spec. It would be dangerous to feed it a 5V clock, it might fry something. Is this the only change? You plan on still using S/PDIF as the interface between the SB3 and the DAC? If yes I presume this means the DAC can be setup for running the Receiver in slave mode, or the DAC has a synchronous reclocker. If the above is true just sending the clock to the SB3 should work. I've bypassed the S/PDIF interface all together and sent I2S from the SB3 to the DAC (well actually left justified format). To implement the mod you'll need to know the specs on the clock coming out of the DAC, is it 11.2896 MHz? What is the voltage? Is it a logic level signal (low is ground) or AC coupled (symmetric around ground)? To do the mod unsolder the crystal, then find out which pad of the crystal goes to the input pin of the chip its connected to (its a standard logic gate chip), solder the clock wire to that pad. Theoretically you should unsolder the caps connected to the pad as well, but in reality it doesn't really matter since the DAC is reclocking the data anyway, getting the lowest jitter in the SB3 is not imperitive. Connect the clock ground to a handy clock reference point on the board. That should do it. John S. -- JohnSwenson JohnSwenson's Profile: http://forums.slimdevices.com/member.php?userid=5974 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
That's funny, I have a TacT unit too and it's limiting my ability to do this. However, I'm assembling a "second path" that should let me hear the system with and without it. I'll let you know how it goes. Mike -- miklorsmith miklorsmith's Profile: http://forums.slimdevices.com/member.php?userid=4349 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
miklorsmith;180625 Wrote: > Thanks a lot! You're welcome! Let us know how it goes! I'm very tempted to do the same thing myself. (Only my habit of using a TacT RCS stops me..) -- P Floding No, I didn't ABX it. And I won't even if you ask me. (Especially not if you ask me.) P Floding's Profile: http://forums.slimdevices.com/member.php?userid=2932 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
Thanks a lot! -- miklorsmith miklorsmith's Profile: http://forums.slimdevices.com/member.php?userid=4349 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Anybody Hacked SB3 > External Clock?
miklorsmith;180612 Wrote: > I'm really coming around to using a DAC as the clock master. I haven't > tried it but I have this DAC: > > http://www.lessloss.com/ > > It is a really killer DAC and they tell me it's only achieving a > fraction of its potential performance. The unit has a clock output and > they say disabling the tranport clock and hardwiring the DAC clock is a > big deal. > > My SB3 was modded by Vinnie at Red Wine Audio and the 12.28 mhz clock > has already been removed. The plan would be to remove the SB3's master > 11.28 mhz clock, among other things. > > I'm ready to give it a try and I have a modder lined up to do the > operation. Has anybody tried this? What are your experiences with it? > Comparisons between before and after? > > Thanks much! > > Mike Hi! Check out this thread: http://forums.slimdevices.com/showthread.php?t=24800 -- P Floding No, I didn't ABX it. And I won't even if you ask me. (Especially not if you ask me.) P Floding's Profile: http://forums.slimdevices.com/member.php?userid=2932 View this thread: http://forums.slimdevices.com/showthread.php?t=32761 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
