Re: Differences between using sndioctl on OpenBSD and Linux

On Mon, Mar 21, 2022 at 04:02:56PM -0400, Jesper Brousseau wrote:
> I am required to use Linux and so I have transferred my typical OpenBSD
> setup to it but noticed the keybind I use to mute and unmute does not
> function. Increasing and decreasing the volume work fine but sndioctl
> output.mute=! returns output.mute: no such control. Is this a limitation of
> sndio using ALSA or could it be added?
> 

On Linux, the code to use the *hardware* volume controls (equivalent
of the OpenBSD audioctl(4) interface) is still missing, so everything
happens as if the hardware had no controls. So, for now, only the
sndiod(8) software volume controls are shown in sndioctl.

Note that if the hardware has no input.level or output.mute controls,
they may be missing on OpenBSD as well.