The only way I have been able to get sound out of this interface is:
1. make sure the snd-usb-audio module is unloaded (I do /etc/init.d/
alsasound stop)
2. unplug the audiophile, then plug it back in. Turning it off and
back on should have the same effect, but it seems to take longer.
3. let the hotplug usb.agent load snd-usb-audio automatically.
This usually takes a few tries, but works eventually. Capture still
doesn't work, though, and I don't think s/pdif works either. There are
three general factors I can think of that might be preventing the
Audiophile from working correctly:
1. The hardware doesn't fully comply with the USB Audio Device Class
Definition, and the quirks haven't all been figured out
2. There is a race condition between snd-usb-audio, the kernel, and
usb.agent causing things to not happen in the same order every time
(putting some printk()s in the ALSA code and looking at the debugging
output confirms this)
3. There might be something wrong with ALSA's usb audio code (the
Audiophile does at least have consistently working playback with
0.9.0rc6, and with the OSS USB audio driver)
Ben
On Sunday 14 September 2003 12:39 pm, moron wrote:
> Howdy. I have been staring longingly at the Ardour site for a while
> and finally decided to try to get ALSA working with my Audiophile USB
> so I could try it out. Up this point, I have been able to use my
> Audiophile USB with no problems at all in KDE via arts (except that
> recording does not work at all). So playback was perfect.
>
> I'm running Gentoo linux and so made use of the portage tree to
> install ALSA. I also installed the OSS emulation layer so I could
> still use common apps.
>
> My problem now is that all sound sent to the Audiophile becomes
> whitenoise, like listening to a big endian audio file via a little
> endian codec. I've tried searching the archives, Usenet and the
> online docs but so far I am not really even sure how to start with
> this. The alsaplayer demonstrates the same problems for the record.
>
> I tried saving the config file for alsactl to see what options I
> would get but this just gives me an empty array:
>
> state.tm {
> }
>
> The audiophile USB doesn't have a mixer from what I understand so the
> alsamixer app does not give me any options for controlling the unit.
>
> So I am a bit stuck on how to proceed.
>
> Any suggestions on what to try to get this puppy working again?
>
> Cheers!
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