kimchee411;670739 Wrote: > I just got a Calyx 24/192 DAC and that is not showing up with aplay -l. > This is what dmesg shows: > > usb 1-1: new high speed USB device using fsl-ehci and address 2 > usb 1-1: configuration #1 chosen from 2 choices > invalid HEADER > snd-usb-audio: probe of 1-1:1.0 failed with error -5 > > I tried this with 2 Touches with the same error. The DAC works > natively in Snow Leopard and is also found and shows up as an ALSA > device on my VortexBox Fusion VM. > > Any ideas? I get the feeling I'm just SOL. SqueezeSlave doesn't > support hi res and the VortexBox solution is unreliable -- it cuts out > completely after a little while. Ahhhhh I don't want to give up the > Squeezebox interface, but I definitely want to use the async USB on my > DAC! > > Thanks... It sounds like your DAC is using the USB audio 2.0 spec, this is not supported in the Touch. We have asked Logitech if they would switch to a new version of ALSA which supports 2.0 and they have stated they are not interested in doing this. Its not an easy task to switch. The newer ALSA versions have a different driver interface which means that the drivers for the other audio devices (internal DAC, S/PDIF and effects speaker) would have to be re-written, no way does Logitech have the bandwidth to do this. Switching to the new ALSA is not that hard if ALL you EVER want to do is connect to a USB DAC, but there is no way Logitech is going to do THAT.
The USB audio driver comes as a standard part of any ALSA release, but the hardware devices in the Touch have custom drivers that Logitech wrote, they are not part of any ALSA release. So if any new version of ALSA is compiled into the firmware it automatically gets the correct version of the USB audio driver, but the custom drivers for the Touch would not compile, they would either have to be re-written or removed from the firmware. I really doubt Logitech is going to release a firmware that can only output audio through a USB DAC. What I would suggest is see if your DAC has a way to run using the old USB Audio 1.0 spec (which is what the Touch supports). Some DACs give you the option. John S. -- JohnSwenson ------------------------------------------------------------------------ JohnSwenson's Profile: http://forums.slimdevices.com/member.php?userid=5974 View this thread: http://forums.slimdevices.com/showthread.php?t=82110 _______________________________________________ Touch mailing list Touch@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/touch
