at any given point, so that changes to the audio subsystems can
be applied live(needed for jack).

this is also usefull in that it can give the ability for a Reset
button on the toolbar along side a play/pause button for being able
to at any point completely kill audio and reset to begining(usefull
for recording takes where you want it to start at specific point w/out
the delays echos etc overlapping for the first iteration.

and removed references to RiffWav in plugins that don't use it.