I know reaper can quantize audio to the grid. Is it possible to quantize audio to the transients of another track? For example I have guitar track and the drums just sound loose can you quantize the drum track to the transients of the guitar track instead of the grid to tighten it up? I am familiar with the audio snap and quantize to transient pool in sonar and am wondering if it is possible to do this in reaper.

I think thats called groove quantize and reaper does not have that yet. Its been requested though.

Yeah I think in Sonar it was extract groove. I hope it gets implemented I used it a lot in Sonar. Mainly because I don't usually record to a click and I could just extract the groove of the guitar to get the drums where I wanted them easily. Thanks for the answer.