getAudio(id).settings.disable(opacity) (since PennController 1.6)
Will disable the controls interface. Note that some browsers might be render disabled interfaces as a plain gray rectangle with no controls visible whatsoever.
If you pass no parameter, a 50% opaque layer will be printed on top of the interface. You can pass a value from 0.01 (fully transparent***) to 1 (fully opaque) to control the aspect of the layer.
*** the value 0 is mistreated as no-parameter by PennController 1.6, hence the need to use a non-null value close to 0.
newAudio("test.mp3") .print() .settings.disable() .play() .wait()
Prints a disabled interface for the audio test.mp3 and starts playing it.