mt32-pi – Testing out New USB Serial Support

Jul 25, 2021

Retrocomputing, Retrogaming, MIDI, How To

mt32-pi – Testing out New USB Serial Support

Retrocomputing, Retrogaming, MIDI, How To

Jul 25, 2021

The latest mt32-pi release has added support for USB serial devices - making it much easier to connect retro gaming PCs via serial cable. Previously we had to use a clunky RS232 to TTL converter module. The new setup is much cleaner.

What you need

  • USB to Serial cable (e.g. this one)
  • Null modem serial port adapter (e.g. this one)

A new configuration option usb_serial_baud_rate has been introduced. You’ll need to edit the mt32-pi configration file (mt32-pi.cfg). Replace the following line:

usb_serial_baud_rate = 31250

With this:

usb_serial_baud_rate = 38400

The PC serial port can’t run at the standard MIDI baud rate of 31250bps. Instead we tell our mt32-pi to use 38400bps – the closest “PC standard” baud rate.

Other than that, the setup is identical to the previous guide. Enjoy!

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