[alsa-devel] OSS emulation and hardware configuration

[Mike Crowe]

> Does the changing of the rate actually succeed?
>

Surprisingly, that's hard to answer.  Normally, most of our audio is
at 48K (we control the sound files), so the device stays at that rate.
 However, a new library we added (for voip communications) is
hard-coded to 8K sample rate via OSS, and I'm now trying to work out
dual usage by our ALSA code and this library's OSS interface.

Before I added these kernel printouts, I was convinced the system was
switching rates properly (because I added 8K rate support to the
hardware driver to get the voip library working).  However, my current
debug load shows the rate changing in the pcm_oss module, but I never
see that rate hit the hardware the way I expected.

If it isn't hitting the hardware, I suppose it could be up/down
converted by ALSA, but I don't have any plugins installed.  I thought
I needed a plugin for ALSA to convert between the two rates, right?

Thanks!
Mike