Hi!
There is a great way to test channels! In fact, the ALSA wiki shouldmention it much more often, because it's not obvious for unexperiencedusers.
Setting up ALSA, you should only use speaker-test to test your setup,like this:
speaker-test -c<X> -D<device> -twav
where <X> is the number of channels of your device and <device> the ALSAdevice you're using. "-twav" is optional, it's just nicer to here avoice than just white noise. If you don't have defined a device (in yourasoundrc file) yet (which you don't need), you have to use a predefineddevice, like "default", "surround51", "surround40", "plughw:0,0" and soon. Get a list of available devices with
aplay -L
If you use my example below, you should use "default" as device. You canchange its name by replacing "pcm.!default" by "pcm.upmix51", so youwould have to use "upmix51" as device with speaker-test.
What you have to do afterwards is make your applications use the deviceyou successfully tested with speaker-test. If "default" works fine, youdon't have to do anything for most (all?) applications. If you want touse another device, either create an alias with
pcm.!default { slave.pcm "<your-device>" }
or configure your applications appropiately (How to do this, depends onthe application).
I'm going to improve the articles of the wiki in the next few months, soif you have any further questions, go ahead and post them. Like this,I'll know what's not clear yet and do the changes accordingly.
Regards, Ingo
Le mercredi 7 février 2007, Ingo Müller a écrit :> > Hi!> >> > Just a *small* improvement/correction/idea about the upmixing device:> >> > pcm.!default {> > type route> > slave.pcm "dmix51"> > slave.channels 6> > ttable.0.0 1> > ttable.1.1 1> > ttable.0.2 1> > ttable.1.3 1> > ttable.0.4 0.5 #was 1> > ttable.1.4 0.5 #was 1> > ttable.0.5 0.5 #was 1> > ttable.1.5 0.5 #was 1> > }
Frédéric COIFFIER schrieb:> Hello,> > I own a Terratec Aureon 5.1 USB and I'm unable to get an analogic 5.1 sound, > just stereo. (In fact, I have tested it with a 5.1 DVD and Mplayer)> Have you a way to test it ? Have you a way to test separately each channel > (front left, rear left...) ?> > Regards,> Frederic> > Le samedi 3 février 2007, Frank Barknecht a écrit :>> Hallo,>>>> Jean-Michel Pouré hat gesagt: // Jean-Michel Pouré wrote:>>> Master Playback Volume controls everything.>> Yes, that's all the Aureon can do. This is not a problem with ALSA.>>>>> We should have seperate controls.>> The Aureon doesn't have seperate controls, there's nothing we or you>> can do about this, sorry. You have to do per-channel control in>> software, just like it's done in MS-Windows.>>>> Ciao
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