VOLUME(2)                     (mux)                     VOLUME(2)

     NAME
          volume - volume control for an infrared interface

     SYNOPSIS
          include "volume.m";
          vctl := load Volumectl Volumectl->PATH;

          volumectl: fn(ctxt: ref Draw->Context, ch: chan of int,
                         device: string);

     DESCRIPTION
          Volumectl should be spawned as a separate process from any
          process that desires volume control via an infrared inter-
          face.  Ctxt provides volumectl with access to the display,
          on which it displays a slider widget.  The slider automati-
          cally disappears after several seconds of inactivity.
          Volumectl receives input from the infrared controller on
          channel ch. The values recognized are:

          VolUP  increase volume

          VolDN  decrease volume

          Enter  exit

          Device is a string used as a prefix to commands to the
          device; for example "audio out" for audio(3).

     FILES
          /dev/volume

     SOURCE
          /appl/lib/volume.b

     SEE ALSO
          ir(2), prefab-intro(2)

     Page 1                       Plan 9             (printed 11/1/25)