NAME

ASetSystemPlayGain − set system play volume

SYNOPSIS

#include <audio/Alib.h>

void ASetSystemPlayGain(

Audio *audio,
AGainDB gain,
long *status_return

);

DESCRIPTION

ASetSystemPlayGain() sets the system play volume to the value in gain.

audio specifies the Audio structure associated with this connection. 

gain specifies in decibels the new value for the play volume. 

status_return receives the returned status of the operation unless it is set to NULL by the application. 

ERRORS

If status_return is not set to NULL by the application, one of the following is returned in status_return.

0 AENoError

2 AEBadAudio

EXAMPLES

The following example sets the system play volume to −6.  This reduces the play volume by a factor of 4, relative to AUnityGain. 

Audio *audio;     /* audio connection */
AGainDB spvol;    /* sys play vol */
long status;      /* error status */
.
.
.
/* set system play volume */
spvol = -6;
ASetSystemPlayGain(audio, spvol, &status);

DEPENDENCIES

This function belongs to the Audio Library of functions that manage connections to an audio server.  The audio server must run on a system that has audio hardware.  To find out whether or not your system has audio hardware, refer to the hardware manual that accompanies your system. 

AUTHOR

ASetSystemPlayGain() was developed by HP. 

SEE ALSO

AGetGain(3X), AGetSystemMonitorGain(3X), AGetSystemPlayGain(3X), AGetSystemRecordGain(3X), AGMGainRestricted(3X), AInputChannels(3X), AInputSources(3X), AMaxInputGain(3X), AMaxOutputGain(3X), AMinInputGain(3X), AMinOutputGain(3X), AOutputChannels(3X), AOutputDestinations(3X), ASetGain(3X), ASetSystemMonitorGain(3X), ASetSystemRecordGain(3X), ASimplePlayer(3X), ASimpleRecorder(3X). 

Using the Audio Application Program Interface.

Hewlett-Packard Company  —  HP-UX Release 9.03: April 1994