the most simple way is to use motion curves.
A short tutorial how to use motion curves is at the official site: http://www.andreas-maschke.com/?page_id=875
To sync music to motion you may create a motion curve from a mp3 file.
Additionally, there is a whole module dedicated to sync of (multiple flames) to music: the Dancing Flames module. But, probably, it needs much more effort (to learn).
Here is an example video: https://www.youtube.com/watch?v=gplUe50 ... e=youtu.be
And, you may also sync fractal motion to the motion of your hands, by using a leap-motion controller (this may work well when you sync the motion of your hands to music)
Here is an example: https://www.youtube.com/watch?v=Z8cwbi- ... e=youtu.be