-- non-subscriber, please reply to sender and MMD --

I just took delivery on a Yamaha G2 with a PianoDisc CD retrofit.  It
sounds great and plays well but I have a problem with two aspects of
the accompaniment/background music.

First, the audio quality is pretty marginal which I assume is a
function of the system's design.  It's plugged into my Sony amplifier
with a pair of Radio Shack RCA cables and fitted with a ground loop
isolator since I had a major problem with background hum when I
first tried to install it.  I can't adjust bass or treble with the
amplifier controls and the result is a muddy, thumping bass and equally
muddy upper registers.  Second, when I try the Bypass button it cuts
out the piano player but the right channel produces nothing but a
whistle and clicking noises.  Hence, two questions:

1. Can I make the playback sound better in some way?

2. If I ever want to use the Bypass, how do I kill the whistle and
clicking?

Thanks for any help you can give me.

Phil Webb