Stop button

I have recently been creating quite a complex project in Aero and have been seriously inhibited by the lack of a stop button, mostly for audio but also just for the behaviours in general. I know you can limit the time they go on for, but I had wanted to add play and pause buttons to encourage interactivity.

I had also wanted to include quite a lot a audio features, but they play over each other if one hasn't finished when another one is triggered. 

This is incredibly annoying and seemingly an easy fix to add a stop/pause behaviour, even just for the audio.