sndio/sndioctl/sndioctl.1

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.\" $OpenBSD$
.\"
.\" Copyright (c) 2010-2012 Alexandre Ratchov <alex@caoua.org>
.\"
.\" Permission to use, copy, modify, and distribute this software for any
.\" purpose with or without fee is hereby granted, provided that the above
.\" copyright notice and this permission notice appear in all copies.
.\"
.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
.\"
.Dd November 29, 2010
.Dt SNDIOCTL 1
.Os
.Sh NAME
.Nm sndioctl
.Nd control sndiod volume
.Sh SYNOPSIS
.Nm sndioctl
.Op Fl f Ar port
.Op Ar expr ...
.Sh DESCRIPTION
The
.Nm
utility sends MIDI volume controller messages (number 7) to adjust
the master
.Xr sndiod 1
volume or programs indivisual volume.
.Pp
The options are as follows:
.Bl -tag -width Ds
.It Fl f Ar port
Specifies the name of the
.Xr sndio 7
MIDI port to use, default is
.Pa snd/0
.It Fl v
Increase log verbosity.
.El
.Pp
In no expression is given,
.Nm
displays 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
.Qq =
followed by a decimal in the 0..127 range,
then the stream volume is set to the given value.
.Sh EXAMPLES
Set mplayer volume to 80:
.Bd -literal -offset indent
$ sndioctl mplayer0=80
.Ed
.Sh SEE ALSO
.Xr sndiod 1
.Xr mio_open 3
.Xr sndio 7