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Welcome to the abcjs (music abc) wiki!
https://cdn.jsdelivr.net/gh/paulrosen/abcjs@main/examples/toc.html
https://composarc.github.io/abcjs/examples/toc.html
https://composarc.github.io/abcjs/examples/karaoke-synth.html
https://composarc.github.io/abcjs/examples/full-synth.html
https://composarc.github.io/abcjs/examples/modify-synth-input.html
find by swing (25)
https://composarc.github.io/abcjs/dist/abcjs-basic.js inkluded https://composarc.github.io/abcjs/src/synth/pitch-to-note-name.js
var pitchToNoteName = {
21: 'A0',
22: 'Bb0',
23: 'B0',
24: 'C1',
25: 'Db1',
26: 'D1',
27: 'Eb1',
28: 'E1',
29: 'F1',
30: 'Gb1',
31: 'G1',
32: 'Ab1',
33: 'A1',
34: 'Bb1',
35: 'B1',
36: 'C2',
37: 'Db2',
38: 'D2',
39: 'Eb2',
40: 'E2',
41: 'F2',
42: 'Gb2',
43: 'G2',
44: 'Ab2',
45: 'A2',
46: 'Bb2',
47: 'B2',
48: 'C3',
49: 'Db3',
50: 'D3',
51: 'Eb3',
52: 'E3',
53: 'F3',
54: 'Gb3',
55: 'G3',
56: 'Ab3',
57: 'A3',
58: 'Bb3',
59: 'B3',
60: 'C4',
61: 'Db4',
62: 'D4',
63: 'Eb4',
64: 'E4',
65: 'F4',
66: 'Gb4',
67: 'G4',
68: 'Ab4',
69: 'A4',
70: 'Bb4',
71: 'B4',
72: 'C5',
73: 'Db5',
74: 'D5',
75: 'Eb5',
76: 'E5',
77: 'F5',
78: 'Gb5',
79: 'G5',
80: 'Ab5',
81: 'A5',
82: 'Bb5',
83: 'B5',
84: 'C6',
85: 'Db6',
86: 'D6',
87: 'Eb6',
88: 'E6',
89: 'F6',
90: 'Gb6',
91: 'G6',
92: 'Ab6',
93: 'A6',
94: 'Bb6',
95: 'B6',
96: 'C7',
97: 'Db7',
98: 'D7',
99: 'Eb7',
100: 'E7',
101: 'F7',
102: 'Gb7',
103: 'G7',
104: 'Ab7',
105: 'A7',
106: 'Bb7',
107: 'B7',
108: 'C8',
109: 'Db8',
110: 'D8',
111: 'Eb8',
112: 'E8',
113: 'F8',
114: 'Gb8',
115: 'G8',
116: 'Ab8',
117: 'A8',
118: 'Bb8',
119: 'B8',
120: 'C9',
121: 'Db9'
};
module.exports = pitchToNoteName;
case "binary":
var decoded = downloadMidi.replace("data:audio/midi,", "");
decoded = decoded.replace(/MThd/g, "%4d%54%68%64");
decoded = decoded.replace(/MTrk/g, "%4d%54%72%6b");
var buffer = new ArrayBuffer(decoded.length / 3);
