Hi Laurie, The fit to improv is a midi based idea, not audio. The idea is that you freely record some midi music on one track, then go back and record a reference track on some other track. Then apply the fit to improv tool and the metronome should now mathch your playing more closely. hth js Laurie wrote: Has anyone used the fit to improvisation in Sonar 4? If so, could you give me a brief overview of the steps to make it work? Does the music you play along with creating the reference track have to be midi