My PSR has limited multi-channel output. I'm trying to set the QY700 to set one input channel to multiple (or at least two) tone generator tracks on the QY700. That way I can play the keyboard with dual voices. I do have a Roland tone generator also. With the Roland, I can set multiple tone generator tracks to one input channel from my keyboard. Thus playing dual or multiple voices. That's what I'd like to do with the QY700.