VOLUME(2) System Calls Manual VOLUME(2)

volume - volume control for an infrared interface

include "volume.m";
vctl := load Volumectl Volumectl->PATH;
volumectl: fn(ctxt: ref Draw->Context, ch: chan of int,
			device: string);

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

increase volume
decrease volume
exit

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

/dev/volume

/appl/lib/volume.b

ir (2), prefab-intro (2)

mux