> On Mar 13, 2020, at 9:54 AM, nia <[email protected]> wrote: > > 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).
This would be great for me too as I'm investigating NetBSD as a basis for a real-time audio effects engine, which is a bit of a fool's errand at the moment for the reasons above and others. But this does suggest (at least) to prefer sunau as a backend for JACK instead of OSS, and confirms why NetBSD OSS is tough to work with currently with most modern audio tools. Identifying the challenges in low-latency audio for NetBSD (and beginning to address them) would make for a great summer of code project-- or even bounty if it's a realistic goal. Dave
