In early English organs, mutations of low pitches (10'' for example) were used to play for the choir in some churches, as choir pitch and organ pitch were often a fourth apart. Thanks for the interesting answers. -- noel jones, aago athens, tennessee, usa ------------------------------- frog music press rodgers organ users group www.frogmusic.com 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