Hi,
Welcome to the group!?
To change the instrument via MIDI, You need to look at the LIST BOOK ?for the QY 70/QY 100.
In order to change the bank/program number via Midi you need send TWO separate midi calls (page 59)… and unfortunately many controllers can only send one message per physical control. ?This is done via two sysex message using the standard sysex format.
Link to QY70 Listbook:
(Look on page 59 for bank/program change info).
I hope this helps,
Eric
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“The longest journey starts with the first step." ?- Lao Tzu