There are 2 examples of midi for Micro Python in this repository.
This is a simple midi example which uses the switch to trigger a sequence of notes.
in boot.py :: import midi_switch
on your host run ttymidi (see below)
midi module ==========
This contains a Controller class that implements a simple abstraction and serves as documentation of some of the standard midi protocol.
Add the following to main.py and import main in boot.py :: import midi
serial = pyb.USB_VCP()
- def midi_controller():
"""Use the accelerometer and the switch as a midi control.""" instrument1 = midi.Controller(serial, channel=1) accel = pyb.Accel() switch = pyb.Switch() while 1: while not switch(): pyb.delay(10) note = accel.x() velocity = accel.y() instrument1.note_on(note + 65, velocity + 65) while switch(): pyb.delay(50) instrument1.note_off(note + 65)
In the console run the function :: >>> midi_controller() then disconnect the console and run ttymidi :: $ ttymidi -s /dev/ttyACM0 -n MicroPythonMidi -b 9600 -v The -v option will output the midi commands to the console.
To hear sound, connect the MicroPythonMidi output to your sound application input using a patchbay tool such as patchage, then press the button.
The orientation of the board will control the pitch and the volume of the note played.
ttymidi a tool to link a serial input to alsa as a midi I/O device.
It is available from https://github.com/cjbarnes18/ttymidi.git
Once compiled, to get it to communicate with Micro Python use the following options. :: $ ttymidi -s /dev/ttyACM0 -n MicroPythonMidi -b 9600
Then use standard midi tools.
I generally use patchage to manage the connections, and Qsynth is a good synthesizer to get started with.