Inside Macintosh: Sound /

Chapter 2 - Sound Manager / Sound Manager Reference

Sound Manager Routines / Controlling Volume Levels

SetDefaultOutputVolume

You can use the SetDefaultOutputVolume function to set the default volume of a sound output device.

FUNCTION SetDefaultOutputVolume (level: LongInt): OSErr;

level

The desired default volume level of a sound output device.

DESCRIPTION

The SetDefaultOutputVolume function sets the default volume of a sound output device. The values you can specify in the high and low words of the level parameter range from 0 (silence) to $0100 (full volume).

SPECIAL CONSIDERATIONS

The SetDefaultOutputVolume function is available only in versions 3.0 and later of the Sound Manager. You can call this function at interrupt time.

ASSEMBLY-LANGUAGE INFORMATION

The trap macro and routine selector for the SetDefaultOutputVolume function are

Trap macro	Selector
_SoundDispatch	$02300024

RESULT CODES

noErr

0

No error