Enumeration Case


The playback volume for the audio queue, ranging from 0.0 through 1.0 on a linear scale. A value of 0.0 indicates silence; a value of 1.0 (the default) indicates full volume for the audio queue instance.


kAudioQueueParam_Volume = 1


Use this property to control an audio queue’s volume relative to other audio output.

To provide UI in iOS for adjusting system audio playback volume, use the MPVolumeView class, which provides media playback controls that iOS users expect and whose appearance you can customize.