control aucat and/or sndiod volume through MIDI
utility sends MIDI volume
controller messages (number 7) to adjust the volume of audio programs using
server for output. It
can send a master volume system exclusive messages as well to control the
volume of the mix of all streams.
The options are as follows:
- Specifies the name of the
sndio(7) MIDI port to use,
default is snd/0
In no expression is given,
the list of streams known by the server and their respective volumes. If an
expression is a stream name, then the volume of this stream is displayed. If
the expression is a stream name followed by “=” followed by a
decimal in the 0..127 range, then the stream volume is set to the given value.
The special master
stream corresponds to the
mix of all streams and sends master volume system exclusive messages.
List known volumes knobs and their values:
Set master volume to 85 and mplayer volume to 100
$ aucatctl master=85 mplayer0=100
master -> 85
mplayer0 -> 100