Plug 'em In
Plug the two QT Py RP2040 boards into two USB MIDI Host devices, such as an iPhone and a Macbook, or a 1010 Music blackbox and a Raspberry Pi-based Shield XL/norns music computer as shown above.
On most devices the connection will be USB-C to the QT Py RP2040 and USB-A on the USB MIDI Host machine. If you involve an older iOS device this may require a Lightning to USB Camera Adapter or similar.
Pick Device
On your Host machines select the device to send and receive MIDI messages. In the example here, the norns software System > Devices > MIDI menu has been used to pick the QTHost2 Red.
Sequence MIDI
Using one USB MIDI Host as a sequencer -- the blackbox in this case -- the MIDI messages are sent to the QTHost2 Blue over USB, then from there to the QTHost2 Red via UART, and then finally over USB to the second host, the Shield XL/norns machine.
Here's a demo of this in action between an iPhone and the ShieldXL:
If your device names don't seem to change on MacOS after updating the firmware, go to Audio MIDI Setup.app, open MIDI Studio, delete the offending devices, and then re-connect them. Voila! New names.
Page last edited February 25, 2025
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