Re: usb sound card

On Fri, Apr 11, 2025 at 09:54:03AM +0300, Gregory Edigarov wrote:
> On Thu, 10 Apr 2025 14:37:17 +0200
> Alexandre Ratchov <alex@caoua.org> wrote:
>
> > On Thu, Apr 10, 2025 at 09:09:21AM +0300, Gregory Edigarov wrote:
> > > Hello Everybody,
> > >
> > > which models are known to work on OpenBSD?
> > > preferably in prosumer/professional segment.
> > >
> >
> > USB class compliant audio interfaces mostly work, i.e. ones marketed
> > as driverless.
> >
> > There are devices that are class-compliant (and work on OpenBSD) but
> > require propretary control software (ex. to switch between line/hi-z
> > modes, phantom power, etc). The control software won't work on
> > OpenBSD, so avoid such devices.
> >
> > How many channels do you need, what latency?
> >
>
> would be nice to have 4 channels. 48khz/16 samples.
>

16 samples at 48kHz corresponds to 0.333ms only, the driver has a 2ms
limit (which is less than the time it takes to the sound to travel 1m,
btw).

As OpenBSD is not real-time, to get stable audio at such small blocks,
you'll need to run only one program and turn off unused features.