Can MPMoviePlayerController have volume programmatically adjusted?

iOS 3.0 - 7.0

Turns out that

[[MPMusicPlayerController applicationMusicPlayer] setVolume:<insert float here>];

works for any sound in the app, even the MPMoviePlayerController, if it's using the main Audio Session. O, it works only on the device, not the simulator. More info here: https://developer.apple.com/documentation/mediaplayer/mpmusicplayercontroller?language=objc

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Update

Volume is deprecated in iOS 7.0.

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