On Wed, 21 Nov 2007 20:33:39 +0100 Paolo Saggese <pmsa4-alsa@xxxxxxxx> wrote: > Hi everybody, > > I have a question for you guys. > > (I'm new to this list and hope this is the right place to ask > and not an FAQ... I've tried to search to see if this question > had been answered previously, but I have been not able to find > what I was looking for). > > I'm thinking about using a dedicated (fanless, diskless, etc) > PC as a digital source for my hi-end Hi-Fi system. > > Of course I plan to use the PC only to provide a "bitperfect" > (exact copy of the original media, normally CD) digital stream > to an external DAC. > > As you probably know better than me, the one major known problem > when you strive for the highest possible quality in digital audio > reproduction is jitter... and the best (if not only) way to really > minimize it is to use a good, clean and stable clock close to the > DAC chip, slaving everything else to that one. > > Thus, what I would need to do would be to "slave" the sound card > SPDIF output clock to the external DAC clock i.e. to make this one > become the "master clock" for the whole digital audio stream. > > AFAIK, one possible way to do this is to set up a "fake" SPDIF > output from the external DAC and connect it to an input of the > sound card whose SPDIF output goes to the DAC for conversion. > > Of course the sound card must be able to "slave" (synchronize) > its SPDIF output clock with the one coming from its SPDIF input. > > (BTW: are there other -perhaps easier and/or better- ways to do > what I would like to do?) > > > Thus, I would need a sound card which must be: > > * cabable of "bitperfect" (pass through) operation at CD standard > 16bit/44.1KHz (as well as, possibly, also at higher resolutions and > sample rates such as 16/48, 24/48, 24/96 and 24/192). > > * capable of "slaving" its SPDIF output clock to an external one, > such as the one reconstructed from its SPDIF input. > > ....last but not least, of course all of this must be done on Linux, > thus the sound card must be fully supported by ALSA! 8-) > > Well, yet another requirement is... that it should possibly (and > hopefully) not cost me a fortune! $-) > > > Thanks in advance for your attention. > > > Ciao e grazie, > Paolo. > > -- > Skype: Paolo.Saggese > http://borex.lngs.infn.it/saggese > You can still escape from the GATES of hell: Use Linux! > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Microsoft > Defy all challenges. Microsoft(R) Visual Studio 2005. > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ > _______________________________________________ > Alsa-user mailing list > Alsa-user@xxxxxxxxxxxxxxxxxxxxx > https://lists.sourceforge.net/lists/listinfo/alsa-user > Extracting data digitally from CD is unrelated to soundcard. Perform web search for 'cdparanoia'. In fact, if you want reliable sound, first transfer data from _all_ your audio CDs to HD and then play it from there. Regarding soundcard and syncrhonization - M-Audio Revolution 7.1, and quite possibly M-Audio Revolution allow you to use external clock source. I have never used SPDIFF myself though. Regards, Sergei. ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
