Having to manually edit icons afterwards is very time consuming - I've just edited 50 in a large notebook... I've learnt the keyboard shortcut - but would be much easier to change in Notebook's preferences.

An additional option, might be to control whether the audio "rewinds" or "pauses", ready to be played again.

Or better still - create an interactive widget that has stop, pause, play rewind etc for audio files. That would be really cool.