[Gap-dev-discuss] Cynthiune - ALSA backend

[Riccardo Mottola]

Hi,

I investigated and I found out two possible reasons why the ALSA backend 
plays badly on my iBook.
1) Looking around on the net I found that apparently some hardwares do 
not accept all rates! This explains perhaps why I have troubles with 
11KHz and 22Khz files
2) we disregard 8bit files and always set 16bit. this can't be good, 
apparently it works on some backends and/or some hardware. Ideally we 
should extend our backend bundles to support that kind of information 
too (hopefully we can get it out of the libraries and file formats!)

I attach a patch to partially work around the problem. ALSA supports 
soft resampling (we set it already and it should have been enough, I 
thing that some kernels are buggy on certain hardware). At least we 
don't fail miserably.

I also attach an 8bit file 11Khz.


Riccardo

ringin.wav
Description: Wave audio

alsa-rate.patch
Description: Text Data