MIDI controller

A controller you can use with any music program: examples/audio/midi_controller.py.

python examples/audio/midi_controller.py

It has eight channel strips (a pan knob, a fader with a level meter, mute and solo), eight velocity pads, pitch and mod wheels, transport buttons and a three-octave piano. PLAY runs a beat on the pads.

It plays its own drum kit and synth through the engine, so you hear everything. Switch on MIDI OUT to also send every move to other programs:

Control	MIDI message
Fader 1–8	Control change 70–77
Pan 1–8	Control change 10–17
Pad 1–8	Note 36–43 on channel 10 (drums)
Piano	Note on / note off on channel 1
Pitch wheel	Pitch bend
Mod wheel	Control change 1

Using it with a DAW

On Linux and macOS the controller opens a virtual port named Pyzed Controller: pick it as a MIDI input in your DAW. On Windows it uses the first MIDI output found (install a loopback driver such as loopMIDI to reach a DAW).

How it is built

def set_level(self, i, value):
    self.levels[i] = value
    self.apply_mix()                              # the engine's mixer channel
    self.send(0xB0, 70 + i, int(value * 127))     # and a MIDI control change

def toggle_midi_out(self, on):
    if on:
        self.engine.open_midi_output(virtual="Pyzed Controller")
    self.midi_out = on

send writes the bytes to the log on the right and, when MIDI OUT is on, calls engine.send_midi(message).