[SlimDevices: Audiophiles] Re: Stick with SB1 or get SB2?
I'm getting 60% signal strength, but am also just about to buy a repeater. The only time I've had drop out's was when my virus scanner kicked in to do a full disk scan and a large attachmentcame in an email. So maybe just upgrade the PSU. Cheers Lee -- lilolee ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
[SlimDevices: Audiophiles] Re: Wired vs. Wireless audio differences
-It is very easy to verify bit-perfect output from SB2 either by playing non-PCM material or by recording with a PC.- The only problem with this (from the perspective of audible differences) is that the bit perfect test is in the digital domain, where jitter is almost irrelevant unless gross enough to exceed the SPDIF receiver's jitter limits. The conversion to analogue is where the problem arises. If for any reason the jitter spectra changes on the SPDIF, between wireless and wired operation, even if 'bit perfect', there will most likely be audible differences. I'm not saying either party is right here, since I've not yet tried it, but it's easy to think that just because it's bit perfect in the digital domain, it remains so when converted to analogue, which isn't true. Jitter only matters at the point of domain conversion, from A-D, or D-A, whereupon its effects are totally dominated by the digital receiver's jitter transfer function. Most SPDIF receivers use a single PLL, with a corner >5k, so any jitter below that remains unattenuated. To measure the effects of jitter (on the analogue output) is quite hard to do, yet the effects are clearly audible. Andy. -- Andrew L. Weekes ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
[SlimDevices: Audiophiles] Re: Wired vs. Wireless audio differences
-It is very easy to verify bit-perfect output from SB2 either by playing non-PCM material or by recording with a PC.- The only problem with this (from the perspective of audible differences) is that the bit perfect test is in the digital domain, where jitter is almost irrelevant unless gross enough to exceed the SPDIF receiver's jitter limits. The conversion to analogue is where the problem arises. If for any reason the jitter spectra changes on the SPDIF, between wireless and wired operation, even if 'bit perfect', there will most likely be audible differences. I'm not saying either party is right here, since I've not yet tried it, but it's easy to think that just because it's bit perfect in the digital domain, it remains so when converted to analogue, which isn't true. Jitter only matters at the point of domain conversion, from A-D, or D-A, whereupon its effects are totally dominated by the digital receiver's jitter transfer function. Most SPDIF receivers use a single PLL, with a corner >5k, so any jiter below that remains unattenuated. Andy. -- Andrew L. Weekes ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
[SlimDevices: Audiophiles] Re: Wired vs. Wireless audio differences
I've just switched from wired to wireless and done a few blind tests and can't hear a difference - using Rotel pre-amp/amp and Rega Jura speakers. The amp is a bit older so I'm using RCA outs from the SB2 All files are FLAC. -- bossanova808 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
[SlimDevices: Audiophiles] Re: Wired vs. Wireless audio differences
or you can play a DTS (surround sound, i.e. "non-pcm") .WAV file to a home theatre receiver. Errors would cause the receiver to lose sync. Google has a bunch of links on how to rip a DTS disc to a WAV file - there are also a few sample files out on the net. I would post a sample file for download but I don't have anything public-domain/free that I could post. If somebody has something (even a home-made test file) that would be a great resource to have. Also I do not understand the objection to trying a blind test. If the difference is audible, indeed "night and day", then it should be equally audible in a blind test. Since the time required to switch between sources is the same, blind or not, I don't see how that makes a difference. Please note, I am not saying you're wrong - I am offering ways to elucidate, quantify, explain, and ultimately resolve any differences. If you're not willing to go those next steps, then I suggest it's rather unfair to claim that there's a problem. -- seanadams ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
[SlimDevices: Audiophiles] Re: Wired vs. Wireless audio differences
Easy, assuming you know your way around an audio editor: Create a small test sample (ideally a clean test tone with obvious starts and ends). Connect the SB2 via wired, connect the digital out to the digital in of your PC. Record on the PC, play on the SB2. Reconnect via wifi, repeat. Now compare the two recordings, either visually, or trim them down to exactly the same length and do a binary comparison of the resulting wav files. I'd do it myself if I had time this evening :) -- radish ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
[SlimDevices: Audiophiles] Re: Wired vs. Wireless audio differences
seanadams Wrote: > It is very easy to verify bit-perfect output from SB2 either by playing > non-PCM material or by recording with a PC. How exactly could us "non-engineers" EASILY do this? It would be great if there is some software program that could objectively compare WIRED vs. WIRELESS streamed SB2 output (either analog or digital out). It's difficult to conduct a blind subjective test comparing the two, since you need to keep reconfiguring the setup for wired or wireless (ain't no way my wife is gonna help me with that ). -- sleepysurf aerius i, nht sub two, yamaha rx-v1000 (pre/pro), sunfire cinema grand 200 ~five (vertically bi-amped), squeezebox2 (streaming cd-quality audio), 300gb buffalo linkstation (remote flac audio file storage), blue jeans cables. 'Click to see pix of my system' (http://www.martinloganowners.com/~tdacquis/forum/showthread.php?t=732) ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
[SlimDevices: Audiophiles] Re: Stick with SB1 or get SB2?
Assuming you're streaming PCM and not getting dropouts: No. -- mkozlows ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
[SlimDevices: Audiophiles] Stick with SB1 or get SB2?
I have an SB1 used wirelessly with my hifi into a goo quality DAC. So would I gain any benefit soundwise by getting a SB2? Cheers Lee -- lilolee ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
[SlimDevices: Audiophiles] Re: Wired vs. Wireless audio differences
I would strongly suggest measurements and/or blind testing for further investigation. It is very easy to verify bit-perfect output from SB2 either by playing non-PCM material or by recording with a PC. -- seanadams ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
[SlimDevices: Audiophiles] Re: Off The Shelf Power Supply
-Just curious: how low in frequency do you see these components and how far down (magnitude) from the fundamental (if you have that handy)?- I'll re-run the test when I get a moment, but from memory the products I was seeing were around -65dB just above 20k. You can tell they are aliasing products (produced by the analyser, not the SB2 directly) since in response to a rising sweep, the resultant signals drop in frequency, which is classic aliasing behaviour. This is just with an audio band (20Hz to 20kHz) sweep too, I'll produce some wider band test files when I get a moment. Andy. -- Andrew L. Weekes ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
[SlimDevices: Audiophiles] Re: Wired vs. Wireless audio differences
MrKegFlex Wrote: > I should note that I'm on a 802.11g network. Does the software do any > downsampling for a 802.11b and/or 802.11g network? I posted in haste and forgot this response from support - "the output of the SB2 is bit-perfect from the files being sent to it" -- MrKegFlex ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
[SlimDevices: Audiophiles] Re: Wired vs. Wireless audio differences
MrKegFlex Wrote: > I too am experiencing the same thing with a wireless SB2. Using flac > files and connecting with digital coax to my avr is not producing the > same sound as my cd player connected with digital coax to my avr. The > sound is totally different... it really is a night/day difference. I > have not had the opportunity to try the wired setup yet, I hope to try > that setup before the end of the week. I should note that I'm on a 802.11g network. Does the software do any downsampling for a 802.11b and/or 802.11g network? -- MrKegFlex ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
[SlimDevices: Audiophiles] Re: Wired vs. Wireless audio differences
I too am experiencing the same thing with a wireless SB2. Using flac files and connecting with digital coax to my avr is not producing the same sound as my cd player connected with digital coax to my avr. The sound is totally different... it really is a night/day difference. I have not had the opportunity to try the wired setup yet, I hope to try that setup before the end of the week. -- MrKegFlex ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
[SlimDevices: Audiophiles] Re: Off The Shelf Power Supply
Just curious: how low in frequency do you see these components and how far down (magnitude) from the fundamental (if you have that handy)? - Dave Andrew L. Weekes Wrote: > > - running a sweep on the SB2 you can see the aliasing products from > the supersonic output folding back on the analyser -- Dave D ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
