Developer Documentation

QuickTime 4 API Documentation

Wired Movies and Sprites

| Previous | Chapter Contents | Chapter Top | Next |

Actions for Sound Tracks

You use these actions for sound tracks to set volume and balance. With these, you can create a button or slider to control sound tracks.

Constant descriptions

kActionTrackSetVolume
IsDelta , WrapsAround Param1 : [ short volume ] Default Min: 0, Default Max: 255

Sets the track's volume level.

kActionTrackSetBalance
Supported Flags: IsDelta , WrapsAround Param1: [short volume] Default Min: -128, Default Max: 128

Sets the track's left to right balance.

The range of numbers is as follows: -128 = only left; 128 = only right; 0 = even amounts of left and right.

© 1999 Apple Computer, Inc.

| Previous | Chapter Contents | Chapter Top | Next |