Bug 146565
| Summary: | Default ALSA config not right for 5.1 USB devices | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Jon Smirl <jonsmirl> |
| Component: | alsa-lib | Assignee: | Martin Stransky <stransky> |
| Status: | CLOSED WONTFIX | QA Contact: | |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 3 | ||
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2005-05-26 11:59:55 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
Unfortunately, this sound card isn't supported by ALSA. Please, write a request at www.alsa-project.org, people there can add your sound card configuration to the list of cards (It's in /etc/alsa/cards/). This is the right way how to do it. Fortunately this card is support under ALSA and I am listening to it
right now. It is a standard USB audio device. What is different is
that it is a 6 channel USB audio device instead of a 2 channel one.
You needs to add something like this to the .asoundrc to hear stereo:
pcm.ch51dup {
type route
slave.pcm surround51
slave.channels 6
ttable.0.0 1
ttable.1.1 1
ttable.0.2 1
ttable.1.3 1
ttable.0.4 0.5
ttable.1.4 0.5
ttable.0.5 0.5
ttable.1.5 0.5
}
With Fedora 4 no USB audio is working out of the box. I have to
manually configure it.
The ALSA support works without issues. It the the Fedora config setup
that is messed up.
Yes, it is the "standard USB audio device with 2 channels", not the "Philips PSC805 Aurilium with 6 channels" and this is the problem. ALSA needs specific configuration for your device and not only a hotfix like asoundrc patch for one specific card. |
I have a Philips PSC805 Aurilium which is a USB 5.1 audio device. The default ALSA config in FC3 is not correct for this device. For example when I use xmms to play a CD it complains that the source has 2 channels and the output has 6. The fix is to add this to .asoundrc. I would have expected the 2:6 conversion to be automatic. There are still other config problem with this device and USB Audio in general. FC3 could do with some more testing on USB Audio devices. For example in another bug gnome-audio does not have the capability to digitally play CDs as needed by USB audio. pcm.ch51dup { type route slave.pcm surround51 slave.channels 6 ttable.0.0 1 ttable.1.1 1 ttable.0.2 1 ttable.1.3 1 ttable.0.4 0.5 ttable.1.4 0.5 ttable.0.5 0.5 ttable.1.5 0.5 } pcm_slave.sl { pcm "hw:0,0" } cards.pcm.surround51 { type plug slave sl1 } Then in xmms set the output device to ch51dup.