I'd try to open the synthesizer and look for a chip that's next to the USB port and google its number. Another option is to try to look at its ID using `lsusb`

I'd try to open the synthesizer and look for a chip that's next to the USB port and google its number. Another option is to try to look at its ID using `lsusb`. If it's a known USB-to-serial chip, then I guess you can mount it and read/write directly to it using pyserial.