68 lines
1.5 KiB
Python
68 lines
1.5 KiB
Python
#!/usr/bin/env python3
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# SPDX-License-Identifier: BSD-3-Clause
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#
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# Constants for MIDI notes.
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#
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# For example:
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# F# in Octave 3: O3.Fs
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# C# in Octave -2: On2.Cs
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# D-flat in Octave 1: O1.Db
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# D in Octave 0: O0.D
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# E in Octave 2: O2.E
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class Octave:
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def __init__(self, base):
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self.C = base
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self.Cs = base + 1
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self.Db = base + 1
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self.D = base + 2
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self.Ds = base + 3
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self.Eb = base + 3
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self.E = base + 4
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self.F = base + 5
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self.Fs = base + 6
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self.Gb = base + 6
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self.G = base + 7
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self.Gs = base + 8
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self.Ab = base + 8
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self.A = base + 9
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self.As = base + 10
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self.Bb = base + 10
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self.B = base + 11
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On5 = Octave(0) # Octave -5
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On4 = Octave(12) # Octave -4
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On3 = Octave(24) # Octave -3
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On2 = Octave(36) # Octave -2
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On1 = Octave(48) # Octave -1
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O0 = Octave(60) # Octave 0
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O1 = Octave(72) # Octave 1
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O2 = Octave(84) # Octave 2
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O3 = Octave(96) # Octave 3
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O4 = Octave(108) # Octave 4
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O5 = Octave(120) # Octave 5
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# Given a MIDI note number, return a note definition in terms of the
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# constants above.
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def def_for_note(note):
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OCTAVES = [
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"On5",
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"On4",
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"On3",
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"On2",
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"On1",
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"O0",
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"O1",
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"O2",
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"O3",
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"O4",
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"O5",
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]
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NOTES = ["C", "Cs", "D", "Ds", "E", "F", "Fs", "G", "Gs", "A", "As", "B"]
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return "%s.%s" % (OCTAVES[note // 12], NOTES[note % 12])
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