Originally Posted by alphx
The track is mainly piano. and i want to make it more synthetic once the bpm spikes... any ways of doing this that are subtle? rather than just stopping the piano and starting the synth?
Try transforming the piano sound into x, and then make x evolve into the more synthetic version. So the piano becomes a new sound, and from that new sound comes your synthetic sound. I guess one way to do it would be to gradually increase the Wet on a vocoder that's on your piano track until the sound becomes something else. Obviously you could have an fx chain and also bring up the wet/dry of other effects so as to further morph the sound of the piano. Maybe see what happens when you modulate the piano with the synthetic version, and conversely - modulate the synthetic version with the piano version. You might need additional copies of those tracks so they aren't modulating each other in a kind of feedback-loop.
Do the same thing to the synthetic version, but just in reverse. Hopefully you can find a middle-ground that sounds very similar for the two instruments. Might be best to bounce those two tracks down and layer the converging sections and play with some automated EQ bands to properly blend the sound.