1  # SPDX-FileCopyrightText: 2021 John Park for Adafruit Industries
 2  # SPDX-License-Identifier: MIT
 3  # midi_UARToutdemo.py - demonstrates sending MIDI notes
 4  
 5  import time
 6  import board
 7  import busio
 8  import adafruit_midi
 9  
10  from adafruit_midi.control_change import ControlChange
11  from adafruit_midi.note_off import NoteOff
12  from adafruit_midi.note_on import NoteOn
13  
14  uart = busio.UART(board.TX, board.RX, baudrate=31250, timeout=0.001)  # init UART
15  midi_in_channel = 2
16  midi_out_channel = 1
17  midi = adafruit_midi.MIDI(
18      midi_in=uart,
19      midi_out=uart,
20      in_channel=(midi_in_channel - 1),
21      out_channel=(midi_out_channel - 1),
22      debug=False,
23  )
24  note_hold = 0.85
25  rest = note_hold / 5
26  
27  print("MIDI Out demo")
28  print("Default output channel:", midi.out_channel + 1)
29  
30  while True:
31      # midi.send(ControlChange(64, 0))  # sustain CC
32      midi.send(ControlChange(1, 0))  # modulation CC
33  
34      midi.send(NoteOn(48, 20))  # play note
35      time.sleep(note_hold)  # hold note
36      midi.send(NoteOff(48, 0))  # release note
37      time.sleep(rest)  # rest
38  
39      midi.send(NoteOn(55, 40))
40      time.sleep(note_hold)
41      midi.send(NoteOff(55, 0))
42      time.sleep(rest)
43  
44      midi.send(NoteOn(51, 60))
45      time.sleep(note_hold)
46      midi.send(NoteOff(51, 0))
47      time.sleep(rest)
48  
49      midi.send(NoteOn(58, 80))
50      time.sleep(note_hold)
51      midi.send(NoteOff(58, 0))
52      time.sleep(rest)
53  
54      # midi.send(ControlChange(64, 32))
55      midi.send(ControlChange(1, 127))
56  
57      midi.send(NoteOn(48, 20))  # play note
58      time.sleep(note_hold)  # hold note
59      midi.send(NoteOff(48, 0))  # release note
60      time.sleep(rest)  # rest
61  
62      midi.send(NoteOn(55, 40))
63      time.sleep(note_hold)
64      midi.send(NoteOff(55, 0))
65      time.sleep(rest)
66  
67      midi.send(NoteOn(51, 60))
68      time.sleep(note_hold)
69      midi.send(NoteOff(51, 0))
70      time.sleep(rest)
71  
72      midi.send(NoteOn(50, 80))
73      time.sleep(note_hold)
74      midi.send(NoteOff(50, 0))
75      time.sleep(rest)