Yeah I got a feeling it won't be very possible..
But as far as sound-video timing - i prefer a bit (or a lot) of off-synchness than garbled up boings, as long as stopping the turbo mode instantly refreshes the buffers.
But as far as sound-video timing - i prefer a bit (or a lot) of off-synchness than garbled up boings, as long as stopping the turbo mode instantly refreshes the buffers.