Newbe problem w/theramin synth sketch - PLEASE help!!!

Ok - there may be a programming issue. I've looked through the source and haven't a clue what I'm seeing (and I suspect I may not be the only one). People by the hundreds aren't answering your request, so let me suggest re-wording for those of us who have no idea what a theramin synth might be, but have either/both electronics/coding abilities and a desire to help...