that's an interesting question. I've never really thought of the proper use of mutations, if there is such a thing as a 'proper' use. I would think mutations were invented to add color, variety..... Carlo Pietroniro Just Published! Using the PR-300 Sequencer Voice Module by Frog Music Press ---- To unsubscribe or change mail delivery (digest, vacation) go to www.frogmusic.com/rodgers.html