Firmware version updates description

1. File name: "PianoBox_Pro_update_FW V0.9 20201118" update file
Update Content: Fixed in V0.8 firmware program->"Reverb" button function can control the reverberation effect of Drum demo.

2. File name: "PianoBox_Pro_update_FW V0.10 20210619B" update file
Update Content: Fixed in V0.9 firmware program->Add MIDI channel mode function, press the "TEMPO" and "REVERB" buttons simultaneously to enable MIDI channel Settings.

3. File name: "PianoBox_Pro_update_FW V0.11 20220222B" update file
Update Content: Fixed in V0.10 firmware program->Added Firmware program modifications compatible with APM32 chips.enables Firmware programs to run on both STM32 and APM32 chips. The goal is to solve the chip shortage.




















