Hi,
Are you connecting you bluetooth receiver directly to RX/TX (serial) of the Arduino ?
I don't know that much about theses bluetooth module but they should be initialized no ?
Midi serial baud rate is 31250, don't know it you can use the midi library at 115200 baud (maybe, never tested).
What do you mean by using the serail port directly ? is this information written on the lcd ?
regards,
xray303