Currently a bit dull - will recognise a 2 USB endpoint USB Midi device plugged into the host, and copy the MIDI messages to the MIDI Device, so they can be seen by anything you plug the device into.
This is an example of how to use ISRs from the PIO on the Raspberry PI Pico. See src/main.cpp for how to enable and respond to ISRs. See src/simply_isr.pio for the assembly to fire a unique ISR per ...
It’s all thanks to the versatility of the programmable I/O (PIO) peripheral inside the Raspberry Pi Pico. This device enables the Pico to be reprogrammed to handle all sorts of complicated tasks ...
The PIO then handles clocking the data out to the attached Raspberry Pi as required. Combining this technique with overclocking the Pi Pico would help Kumar nail the 100 megasamples/sec target ...