[SlimDevices: Audiophiles] any expereinces using the jumper?
I have been playing with the -10,-20,-30db jumpers along with using the volume control on the Transporter. I can set my amp to 3/4 volume and trim the volume with Transporter with the jumpers set to -10db. It sounds good. I havent really noticed any sound differences. I would not want to use the Transporter volume control for more than 10db or so, to avoid any significant loss of data. Its mostly a paranoia thing. I really havent noticed a sound difference from loss of signal due to the digital volume control. I tend to trust my Alps Blue Velvet pot over the Transporter volume control. Most of the volume adjustment occurs there. Something new that I tried that has been very satisfying is I now use my MSB dac for the sub amp. I run the digital coax from the Transporter to the dac and run the RCA's off the dac to the sub amp. - The bass is very good. If anything there is too much signal. I have to set the high pass at 30Hz and play with a 3-5db cut in the 50hz area. The nice thing is the digital out is controlled by the Transporter volume control, so from my chair I can control the volume to both amps with the Transporter volume control. I guess I wonder what other feel about using the jumpers - Thanks - Eric -- earwaxer Waxer Transporter Winsome labs mouse (modified) Maggie MMG's (modified) JPS Labs power cords Audioquest Granite speaker wire Silver Bullet interconnect HSU research sub earwaxer's Profile: http://forums.slimdevices.com/member.php?userid=32040 View this thread: http://forums.slimdevices.com/showthread.php?t=68090 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
[SlimDevices: Audiophiles] Questions re 24 bit audio
Hello- I have recently found how to decode HDCD into 24 bit FLACs using dBpoweramp, and they sound very good, much better than the 16-bit, non decoded FLACs of the same CDs. Close to my SACDs, and I am done with that format, for reasons not worth getting into here. Based on this, I naturally want to get more 24-bit material. 96kHz is fine too, but 24 bits (20 really, for HDCD) made enough of a difference that 44.1/48/96 are all OK to me. Which leads to a few questions; any help appreciated: 1. Where can I get more 24 bit material? HDCDs, obviously. HDTracks downloads at 24/96, which I believe the Duet will downsample to 48 kHz using Sox, which would be transparent to me. Ripping DVD-A to FLAC is presumably the same in that regard. Are there other sources, especially for rock things not classical? I am confused by the various DVD standards, and do not want 5.1 surround. 2. SPDIF appears to be designed for 20 bit transmission, w/a non-standard 24 bit implementation (cf wikipedia). Should I care about this, or do all decent high end DACs (I run an external 24 bit DAC) accept some 24 bit non-standard (as in not IEC) standard here, and so it'll work fine? HDCD is only 20 bit anyway, so if the 4 LSB are being cut off I wouldn't know, whereas for real 24 bit material I presumably would. 3. If I got 24/192 material in FLAC, will the Duet downsample THAT to 48 kHz? Or will I have to find some other way to get that to my DAC? Any help appreciated, thanks! -- lork lork's Profile: http://forums.slimdevices.com/member.php?userid=17438 View this thread: http://forums.slimdevices.com/showthread.php?t=68092 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] SeeDeClip/TxtDeClip
This is a very interested thread - I read it all. What happened to Slim Devices considering adding a plug-in? I cross my fingers it will be added to SqueezeCenter some day. On my wishlist I have: 1. OK if the plugin ignores files that are not FLAC 2. Let it be an on-the-fly (streamed) process. 3. Reduce level by e.g. 2 dB 4. Analyze portions of e.g. 1.5 seconds - focusing on middle 500 ms. Ignore content below 10 Hz. If clipping is found in the middle 500 ms (should give you at least 5 cycles of 10 Hz to work on), take care to match the music coming before and after (unclipped portions) regarding frequency content, etc. and make e.g. a linear level connection from before to after clipping, assumed to make it sound apparently natural in the restored section. 5. If the 2 dB was not enough for your restoration algorithm (i.e. if there's still flat clipping), use rounding within your 2 dB to make soft clipping and repeat the process (once ... if still clipping - accept it and let it pass). 6. Let go of the first 500 ms (send to Squeezebox). Push second and third 500 ms ahead and load new portion of 500 ms. Repeat step 3/4. 7. I don't want L/R channel to be gain regulated differently - if the channels are different in gain to begin with, keep it that way. 8. I hope the plugin can be made sufficiently simple that it can run in an environment with a low-power CPU (like my Synology NAS, which has a Marvel CPU and 128 Mb RAM ... AFAIR). 9. I suppose if the FLAC is a 16 bit audio signal, that bits can be added at the top (as zeros) and the plugin works with the newly achieved additional bits to get 2 dB headroom. This could also be done with 24 bit audio (just add bits at the top). 10. Upsampling, Dithering and such is in the domain of SoX ... not the plugin, so anything desirable here I'll let up to other plugins. One of the primary purposes of such a plugin would be to change the music that doesn't sound good into something that sounds reasonably good to the ear. -- cfuttrup cfuttrup's Profile: http://forums.slimdevices.com/member.php?userid=32784 View this thread: http://forums.slimdevices.com/showthread.php?t=57872 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] any expereinces using the jumper?
earwaxer;459731 Wrote: I would not want to use the Transporter volume control for more than 10db or so, to avoid any significant loss of data. Its mostly a paranoia thing. I really havent noticed a sound difference from loss of signal due to the digital volume control./QUOTE] The digital volume control doesn't really work that way. There is no 'significant loss of data'. The transporter volume control is done in 24 bits (144dB) so the errors generated by volume control are well below the noise floor of just about all the amplifiers out there. Basically it's below the SNR of the transporter itself (120dB). What the jumpers are intended for is to allow matching of the transporter to amplifiers and pre-amplifiers that have too much input gain and distort when given too much signal. It can also be used for no-volume-control amplifier only setups where the transporter is the only source of control and maximum output of the transporter would be either too loud or damage the speakers. Other situations where you might want to adjust the jumpers would be if you had a quiet component that you switch between on your pre-amplifier and the transporter seems much louder than the other component. Or if you are worried about someone cranking the volume on your pre-amp all the way up and turning on the transporter causing speaker damage. If you control the volume mostly with the amplifier's POT, you will want to set the jumper to 0dB (max) so that you get the highest SNR signal sent from the transporter to the amplifier. -- SuperQ SuperQ's Profile: http://forums.slimdevices.com/member.php?userid=2139 View this thread: http://forums.slimdevices.com/showthread.php?t=68090 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] any expereinces using the jumper?
Oh, I should also mention that there are some advantages to keeping the transporter's volume set to 90%. There was a thread (sorry, I don't know which one) a while back about replay-gain and clipping. Gain is not allowed on tracks that are quiet, but would cause clipping if boosted too much. Setting the TP volume to 90 allows the volume software headroom to boost quiet tracks and provide better dynamics. -- SuperQ SuperQ's Profile: http://forums.slimdevices.com/member.php?userid=2139 View this thread: http://forums.slimdevices.com/showthread.php?t=68090 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] AAC Plus support now in iTunes 9.0 iPhone 3.1
I assume you have set iTunes to deal with HE encoding. In PreferencesGeneralImport SettingImport usingAAC EncoderSettingCustomcheck Use High Efficiency Encoding. Does that help? -- avta avta's Profile: http://forums.slimdevices.com/member.php?userid=1860 View this thread: http://forums.slimdevices.com/showthread.php?t=67998 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] any expereinces using the jumper?
very cool! - thanks for the info! Eric -- earwaxer Waxer Transporter Winsome labs mouse (modified) Maggie MMG's (modified) JPS Labs power cords Audioquest Granite speaker wire Silver Bullet interconnect HSU research sub earwaxer's Profile: http://forums.slimdevices.com/member.php?userid=32040 View this thread: http://forums.slimdevices.com/showthread.php?t=68090 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Questions re 24 bit audio
I've found a fair number of music/concert dvd's have a 24/48 PCM stereo soundtrack, which can be ripped fairly easily. So that's one source of higher res content. SPDIF is a format that's evolved over the years, but just about any current product will pass 24/48 without problem. Better hardware will to 24/96, and the best will do 24/192 but that's pretty rare in my experience. The Duet is hardware limited to 24/48, so you'll always be down-sampled to that limit. -- DCtoDaylight Audiophile wish list: Zero Distortion, Infinite Signal to Noise Ratio, and a Bandwidth from DC to Daylight DCtoDaylight's Profile: http://forums.slimdevices.com/member.php?userid=7284 View this thread: http://forums.slimdevices.com/showthread.php?t=68092 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] any expereinces using the jumper?
SuperQ;459751 Wrote: Oh, I should also mention that there are some advantages to keeping the transporter's volume set to 90%. There was a thread (sorry, I don't know which one) a while back about replay-gain and clipping. Gain is not allowed on tracks that are quiet, but would cause clipping if boosted too much. Setting the TP volume to 90 allows the volume software headroom to boost quiet tracks and provide better dynamics. Of course, this is only true if you're using replay-gain... If you're not, then 100% will always give the best -- DCtoDaylight Audiophile wish list: Zero Distortion, Infinite Signal to Noise Ratio, and a Bandwidth from DC to Daylight DCtoDaylight's Profile: http://forums.slimdevices.com/member.php?userid=7284 View this thread: http://forums.slimdevices.com/showthread.php?t=68090 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
