I just reply here since you mention your animation module. Regrettably I haven't had time to try your latest jWildfire releases. I want to be safe as I can be and do a system backup image before I install the latest java 7.
Consequently I'm not sure what type of sound synchronization you are doing. Most syncs I've seen seem to be related to beat or amplitude. I haven't looked at all of your animations but that seems to be what I've seen in those I've watched.
Have you considered varying the opacity and/or xaos values of transforms through some relationship to the audio?
I was thinking maybe those values could be tied into the pitch, or possibly tone quality, of various instruments in the audio - something like that anyway. I have no idea how you and others coordinate the beat or tempo with to the flame patterns.
Because of my sensitivities I guess, I prefer smooth, fluid animations to jumpy, pulsing animations.
When this notion occurred to me, I kind of visualized flame animations with different elements of the flame going through varying degrees of visibility. But I don't know if it could be done or if so, how hard it would be to do. I'm fairly certain a lot would depend on how you get information from the audio that you synchronize the video with.