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Re: Audio volume setting: not working - sometimes?
On Thu, Jul 01, 2021 at 08:59:04AM -0400, Mouse wrote:
> > The primary gain control might not be the one currently responsible
> > for output volume depending on the various DACs available.
> Possibly - but audioctl's play.gain field _does_ work to control the
> output volume. I had thought audioctl's play.gain was just a different
> interface to the same thing the play.gain field of struct audio_info
> controls, which is why I found it puzzling that audioctl works but the
> API I thought was equivalent doesn't.
audioctl is primarily for manipulating /dev/sound, which persists
these settings between opens, whereas /dev/audio doesn't. audioctl
works by performing SETINFO on /dev/audioctl.
If you need the "audio device parameters persist between opens" feature
I'd recommend using /dev/sound instead.
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