Hello!
After almost weeks of research and try-and-error I got my wish
configured: MythTV (and other software that is using ALSA) is now
switching the sample rate according to the given input samplerate.
TV/DVD: 48000 Hz, mp3/CD: 44100 Hz. And thats even without some
dmix-resampling, it goes straight to hardware. This I got managed
because of the following asound.conf (Ubuntu 8.10, ALC880) and setting
MythTV to Mixer "MyMainVol":
pcm!.default {
type plug
slave.pcm "softvol"
}
pcm.softvol {
type softvol
slave {
pcm "hw:0,0"
}
control {
name "MyMainVol"
card "0"
}
Afterwards it seems so logical, it's embarrasing it took me so long to
get this straight ;-)
Anyway, there is one thing that is worrying me now a little bit: How to
handle a samplerate that is not supported by the hardware (in my case
this would be any samplerate except for 44100 and 48000 Hz)? As testet
with "speaker-test -r 32000" I can`t hear anything in such a case.
My idea to solve this is to create a new dmix-device that resamples
everything except for 44100/48000Hz-material to e.g 48000 Hz. But how to
get ALSA to automatically switch between "hw:0,0" (for 44100 and 48000
Hz) and "dmix" (for any other samplerate) according to the samplerate of
the input stream.
I am not expecting a complete solution, but I am hoping at least for an
answer if this is possible at all. Thanks in advance.
Greets!
H.Dampf
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