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Inside Macintosh: Sound /
Chapter 2 - Sound Manager / Sound Manager Reference
Sound Manager Routines / Controlling Volume Levels

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Important: Inside Macintosh: Sound is deprecated as of Mac OS X v10.5. For new audio development in Mac OS X, use Core Audio. See the Audio page in the ADC Reference Library.

GetDefaultOutputVolume

You can use the GetDefaultOutputVolume function to determine the default volume of a sound output device.

FUNCTION GetDefaultOutputVolume (VAR level: LongInt): OSErr;
level
On exit, the default volume level of a sound output device.
DESCRIPTION
The GetDefaultOutputVolume function returns, in the level parameter, the default volume of a sound output device. The values returned in the high and low words of the level parameter range from 0 (silence) to $0100 (full volume).

SPECIAL CONSIDERATIONS
The GetDefaultOutputVolume 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 GetDefaultOutputVolume function are
Trap macroSelector
_SoundDispatch$022C0024

RESULT CODES
noErr0No error
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© Apple Computer, Inc.
2 JUL 1996