It should be in the basic if statement area.
My C3 isn't showing it either.
This could be a new glitch or it was intentionally removed...
I wonder if anyone has any insight into this?
Advanced audio supported
If true, the current browser supports all the features in the Advanced categories of the Audio object. If false, none of these features will have any effect on playback. Advanced audio depends on the Web Audio API, which all modern browsers support.
Is any playing
True if any audio is currently playing.
True if the object has been set in to silent mode using the Set silent action.
Is tag playing
True if any audio with a given tag is currently playing.
Triggered when a sound with a given tag finishes playing. This is not triggered for looping sounds.
True when all audio preloaded with one of the preload actions has finished loading.