[QUOTE] Is there any way to lock the Octave -1 so that it will be effective in all the variation, untill I manually deactivate it?

Hi Doron

It's quite simple.
Use the Expand Mode Filter. Press and hold the Set button. Select Expand Mode. Go to page 2 and change R1/R2 Octave to OFF. Whatever Octave setting you choose will remain unchanged for all Panel Memories. However, you should remember that as long as you are in Expand Mode, the octave settings for other songs/tunes will also remain unchanged for each panel memory

John