Cover image for Electric Trombone

Electric Trombone

Build an electric trombone using a Raspberry Pi Pico as a MIDI controller.

 4 March 2024   |     5 minute read   |   By Kevin McAleer   |   Share this article on

Video

For every project I create, I often make a corresponding YouTube video. Sometimes, there might be more than one video for a single project. You can find these videos in this section.

Explore more through this this dedicated video.

Work in progress - more to come soon; checkback later for more details.

Bill of Materials

Item Description Cost Qty Total
Ultrasonic Range Finder   1  
Fan Monk Makes fan   1  
Pico W Raspberry Pi Pico W £7.20 1 £7.20

Steps

graph TD;
    A[Design 3d Enclosure / Holder for parts] --> B[Print enclosure];
    B --> C[Assemble parts];
    C --> D[Solder parts / Connect wires];
    D --> E[Write Circuit Python Midi code];
    E --> F[Test];

Midi Notes to Frequency

MIDI note number Key number (Organ) Key number (Piano) Note names Frequency (Equal tuning at 440 Hz)
top of MIDI tuning range     G#9/Ab9 13289.75
127     G9 12543.85
126     F#9/Gb9 11839.82
125     F9 11175.30
124     E9 10548.08
123     D#9/Eb9 9956.06
122     D9 9397.27
121     C#9/Db9 8869.84
120     C9 8372.02
119     B8 7902.13
118     A#8/Bb8 7458.62
117     A8 7040.00
116     G#8/Ab8 6644.88
115     G8 6271.93
114     F#8/Gb8 5919.91
113     F8 5587.65
112     E8 5274.04
111     D#8/Eb8 4978.03
110     D8 4698.64
109     C#8/Db8 4434.92
108   88 C8 4186.01
107   87 B7 3951.07
106   86 A#7/Bb7 3729.31
105   85 A7 3520.00
104   84 G#7/Ab7 3322.44
103   83 G7 3135.96
102   82 F#7/Gb7 2959.96
101   81 F7 2793.83
100   80 E7 2637.02
99   79 D#7/Eb7 2489.02
98   78 D7 2349.32
97   77 C#7/Db7 2217.46
96 61 76 C7 2093.00
95 60 75 B6 1975.53
94 59 74 A#6/Bb6 1864.66
93 58 73 A6 1760.00
92 57 72 G#6/Ab6 1661.22
91 56 71 G6 1567.98
90 55 70 F#6/Gb6 1479.98
89 54 69 F6 1396.91
88 53 68 E6 1318.51
87 52 67 D#6/Eb6 1244.51
86 51 66 D6 1174.66
85 50 65 C#6/Db6 1108.73
84 49 64 C6 1046.50
83 48 63 B5 987.77
82 47 62 A#5/Bb5 932.33
81 46 61 A5 880.00
80 45 60 G#5/Ab5 830.61
79 44 59 G5 783.99
78 43 58 F#5/Gb5 739.99
77 42 57 F5 698.46
76 41 56 E5 659.26
75 40 55 D#5/Eb5 622.25
74 39 54 D5 587.33
73 38 53 C#5/Db5 554.37
72 37 52 C5 523.25
71 36 51 B4 493.88
70 35 50 A#4/Bb4 466.16
69 34 49 A4 concert pitch 440.00
68 33 48 G#4/Ab4 415.30
67 32 47 G4 392.00
66 31 46 F#4/Gb4 369.99
65 30 45 F4 349.23
64 29 44 E4 329.63
63 28 43 D#4/Eb4 311.13
62 27 42 D4 293.66
61 26 41 C#4/Db4 277.18
60 25 40 C4 (middle C) 261.63
59 24 39 B3 246.94
58 23 38 A#3/Bb3 233.08
57 22 37 A3 220.00
56 21 36 G#3/Ab3 207.65
55 20 35 G3 196.00
54 19 34 F#3/Gb3 185.00
53 18 33 F3 174.61
52 17 32 E3 164.81
51 16 31 D#3/Eb3 155.56
50 15 30 D3 146.83
49 14 29 C#3/Db3 138.59
48 13 28 C3 130.81
47 12 27 B2 123.47
46 11 26 A#2/Bb2 116.54
45 10 25 A2 110.00
44 9 24 G#2/Ab2 103.83
43 8 23 G2 98.00
42 7 22 F#2/Gb2 92.50
41 6 21 F2 87.31
40 5 20 E2 82.41
39 4 19 D#2/Eb2 77.78
38 3 18 D2 73.42
37 2 17 C#2/Db2 69.30
36 1 16 C2 65.41
35   15 B1 61.74
34   14 A#1/Bb1 58.27
33   13 A1 55.00
32   12 G#1/Ab1 51.91
31   11 G1 49.00
30   10 F#1/Gb1 46.25
29   9 F1 43.65
28   8 E1 41.20
27   7 D#1/Eb1 38.89
26   6 D1 36.71
25   5 C#1/Db1 34.65
24   4 C1 32.70
23   3 B0 30.87
22   2 A#0/Bb0 29.14
21   1 A0 27.50
20       25.96
19       24.50
18       23.12
17       21.83
16       20.60
15       19.45
14       18.35
13       17.32
12       16.35
11       15.43
10       14.57
9       13.75
8       12.98
7       12.25
6       11.56
5       10.91
4       10.30
3       9.72
2       9.18
1       8.66
0       8.18

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