When you open with a music track and then have voiceover, it is really helpful to lower track volume when voiceover starts and then make it louder when voiceover ends before fading out.
essential for videos with voice overs, or you just end up having to use different software to add the music separately so it is controllable. this of course means we can't use the stock music in Doodly (or we have to do our voice over in a different application)