I am converting a nickelodeon that uses the Play-Rite "O" rolls. Does anyone have the information for what hole controls what note or function? I know I can figure it out on my own by messing with the tracking bar but if this information is already available it would save me some time. Thanks, Dave Burritt Broomfield, Colorado http://www.universalmidicontroller.com/ dave@universalmidicontroller.com.geentroep [delete ".geentroep" to reply] [ These MMD articles have information about the O-roll scale: [ https://www.mmdigest.com/archives/Digests/200801/2008.01.14.09.html [ https://www.mmdigest.com/archives/Digests/201907/2019.07.28.02.html [ https://www.mmdigest.com/Gallery/Tech/Scales/Coinola-O.html [ -- Robbie