I recorded a song, midi, on my Yamaha s900. All is well except the RH part, organ, is not loud enough. I have pressed everything I can think of and can't figure out how to boost volume. Can I? I suppose, if not, I could mute that track, and then play the recording and record it. And play the RH louder.

BTW, if I press Balance and boost the RH part, it doesn't do it.