Re: Audio recording (using ossaudio)

[nia <nia%NetBSD.org@localhost>]

On Tue, Mar 10, 2020 at 08:49:55PM +0200, Yorick Hardy wrote:
> Can anyone else record audio correctly via ossaudio?
> audiorecord seems to work as long as the frequency
> divides the native frequency (see dmesg excerpt below)

(I missed this post, but got contacted about it directly off-list. I'm
probably a good person to contact about this sort of thing).

The sample rate and number of channels need to exactly match the device
for ideal output.

The ffmpeg OSS code looks very primitive. I might be persuaded to write
a backend that does detection of device characteristics. It's basically
required for proper audio recording on NetBSD. Note that our OSS emulation
doesn't match the spec exactly, and is also undocumented, so doing anything
non-trivial is hard. I don't recommend writing new code that uses it for
that reason.

Out of curiosity, does Audacity work for you (when set to single channel
16-bit PCM, etc - it defaults to 32-bit floats which won't work).