I dont know if this has been answered or not, so here is my solution. 1 press insert+0 2 press ctrl+shift+D to open default scripts 3 press ctrl+L to open list of scripts 4 type the letters M U to get to mute synthesizer and enter on it 5 press ctrl+D tab to atach to key and check it if its not already checked. tab down to where it asks you to enter a hotkey, and press the hot key of your choice. I use ctrl+grov grov its located above the tab key and to the left of the 1. 6 tab to OK press enter 7 save the settings with ctrl+S 8 press alt+F4 to exit. I hope this helps you! Thanks, Rob You can leave me a voice mail or fax at 206-337-3134 "God is good all the time, & All the time God is good"