Hi all.
I have a Ketron Audsys 5 which I bought to

1) Make backing tracks using the keyboard
2) Connect a mic and overdub vocals.

But it seems to be incredibly difficult to do so.
I have followed the instructions to the letter (select overdub mode, give name to file etc) but when it comes to pressing user button 5 to start recording, I press it and nothing...
Now I can get recording started by first pressing MENU and then f5 but this just starts a normal recording.
Whats worse - is if I try this and then start my backing track, then overdub, it seems to record (and post process) but the file afterwards is wildly out of sync. Like 2 secs between the backing track and the mic.
Ive tried several methods - all to no avail, so would genuinely appreciate any help here.
thanks
Mark.