Fran, I can't speak to the grey dots, but I know when I got befuddled with the +1 -1 notatation (I have an Insignia) Noel reminded me that they were octaves. So a 90 -1 would be Midi voice 90 down one octave (refer to the Trillium Book or manual to find out how to set for your organ) Hope this helps, Clay ------------ Composer-in-residence frog music press, publishing MIDI music at www.frogmusic.com ! ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Find new MIDI music and Guides to Rodgers Organs at www.frogmusic.com To post send messages to: rodgersorgan@xxxxxxxxxxxxx To unsubscribe or change mail delivery (digest, vacation) go to www.frogmusic.com/rodgersmem.html