This helped me..
I am really new to Vixen and all the Videos really help. I had a hard time with my 1st song, I am gonna redo it with my new method. Here is how it helped me with the timing since areas of the song change, So in Event Sequence Audio change key behavior to "Creates events while a key is pressed, until released", then tap out the whole song holding control where you want delays, I am doing Alvin and the Chipmunks for example and on the hula hoop part hold control longer, made it much easier to get my tree to spin with that part. Not sure if that will help. But it helped me.