I wonder whether the Zero UARTs can also be easilly adapted to the MIDI speed of 31250 bps. On RaspberryPi this is achieved by setting the standard speed of 38400 together with “underclocking” the UART from 3MHz down to 2.441406Mhz, eg. using the boot parameter init_uart_clock = 2441406
or an equivalent DTB overlay (midi-uart0.dts). Would something like this work on the Radxa Zero as well?