JohnSwenson;694423 Wrote: > I've looked carefully into the 192 issue with the Touch and I see no > hardware reason why it cannot be done. The crystals are the correct > frequencies, the reclocking flops will easily work with those > frequencies etc. The only hardware issue might be TOSLINK. Very few > TOLINK receivers have a high enough bandwidth to reliably handle 192, > even if it could the jitter at the TOSLINK receiver is going to > something fierce, it would take a very special DAC to deal with that. > > The coax output is a different story, it should be able to handle 192 > without any problems. > > The big issue is the driver. It simply was not written for 192. Someone > would have to sit down with the processor databook and work out all the > register values to allow 192 to work and then rewrite the driver. > > There is more to it than even that. There are a number of buffers in > squeezeplay and ALSA that would probably have to change as well. The > parameters have all been originally tuned for 44.1, at higher sample > rates they may start not working quite as well. At 96 some of these are > getting sort of marginal, at 192 the system may become pretty unstable. > Its not necessarily that the hardware "can't keep up" but that the > software needs to be retuned for higher sample rates. I've seen a few > places where the code has already been tweaked slighty to handle 96, > there will most likely be more of these for 192. > > So while I think it could be done, and it is "just a matter of > software", the probability of it happening anytime soon is pretty low. > > > John S.
Thanks for the thoughtful analysis. After getting my custom PS (built for the Duet) back after adjusting for the SBT's voltage (5V) and putting it back into the system (replacing the standard wall wart), I did a few more A/B tests on the flac decoding on server vs SBT. At the early morning listening levels that I was testing under, I could hardly tell the difference, if any. So, perhaps I would stay with decoding on SBT for now, for the convenience of everything at least getting played without trouble. Maybe my thoughts will be different if I ever get around to try the hybrid wifi solution (Wifi AP running ethernet cable into SBT). Thanks. -- eduardoo ------------------------------------------------------------------------ eduardoo's Profile: http://forums.slimdevices.com/member.php?userid=25850 View this thread: http://forums.slimdevices.com/showthread.php?t=93970 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/audiophiles
