[alsa-devel] Random inverted audio channels
a.bouin at kerlink.fr
Thu Mar 20 11:27:46 CET 2008
> I'm currently working on an internal project.
> Here is some details :
> This embedded project includes a AT91SAM9260 CPU and a WM8900 codec.
> Audio driver is using ASoC API.
> Audio data could be either switch from I2S or DSP A, but I prefer the
> second one.
> Audio Codec is master.
> We have an issue : when we play a right channel stereo track, sound is
> played on right channel, but sometimes on left.
> This issue could happen right after starting kernel, or later after 10-
> 20 sounds played.
I'm back on this issue. I have few questions about it and I'd hope someone
could answer :
- does someone have already used AT91 SSC controller in slave mode ? Can he
send me his register configuration and tell if he already heard and L/R
channels swaps ?
- is there a way to play a sound at the lowest software level, maybe without
using alsa or dsp devices ?
- where is the software audio buffer ?
As you can see I really want to trace any difficulties to find where comes
As always, if you have any other ideas to test, I'll be glad to hear them.
Thanks and regards,
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