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tomidi.py
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tomidi.py
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import midi
import random
def toMidi(songString, outfile, instrument=27, tempo=0):
quarterNote = 96
if tempo == 0:
tempo = random.choice(range(100, 200))
print tempo
chords = {
0: [midi.C_4, midi.E_4, midi.G_4],
1: [midi.C_4, midi.Ds_4, midi.G_4],
# 2: [midi.D_4, midi.E_4, midi.A_5],
2: [midi.D_4, midi.F_4, midi.A_5],
3: [midi.D_4, midi.F_4, midi.A_5],
4: [midi.E_4, midi.G_4, midi.B_5],
5: [midi.E_4, midi.Gs_4, midi.B_5],
6: [midi.F_4, midi.Gs_4, midi.C_5],
7: [midi.F_4, midi.A_5, midi.C_5],
# "8": [midi.G_4, midi.As_5, midi.D_5],
8: [midi.G_4, midi.B_5, midi.D_5],
9: [midi.G_4, midi.B_5, midi.D_5],
10: [midi.G_4, midi.B_5, midi.D_5, midi.F_5],
11: [midi.A_5, midi.C_5, midi.E_5],
12: [midi.A_5, midi.Cs_5, midi.E_5],
13: [midi.B_4, midi.D_4, midi.F_4]
}
chordInput = []
chordInput = [c for c in songString if 0 <= c <= 13]
pattern = midi.Pattern(resolution=quarterNote)
track = midi.Track()
track.append(midi.ProgramChangeEvent(tick=0, data=[instrument]))
pattern.append(track)
tempoString = hex(60000000/tempo).replace("0x", "")
if len(tempoString) < 6:
tempoString = "0" + tempoString
tempoData = map(lambda x: int(x, 16), [tempoString[i:i+2] for i in range(0, len(tempoString), 2)])
print tempoData
track.append(midi.SetTempoEvent(tick=0, data=tempoData))
for index, chord in enumerate(chordInput):
if index > 0 and chord == chordInput[index-1]:
continue
if chords.get(chord) != None:
hold = 1
while index+hold < len(chordInput) and chord == chordInput[index+hold]:
hold = hold+1
first = True
for note in chords.get(chord):
if first:
track.append(midi.NoteOnEvent(tick=1, velocity=100, pitch=note))
first = False
else:
track.append(midi.NoteOnEvent(tick=0, velocity=100, pitch=note))
first = True
for note in chords.get(chord):
if first:
track.append(midi.NoteOffEvent(tick=quarterNote*hold-1, pitch=note))
first = False
else:
track.append(midi.NoteOffEvent(tick=0, pitch=note))
track.append(midi.EndOfTrackEvent(tick=quarterNote))
drums = midi.Track()
pattern.append(drums)
drums.append(midi.TrackNameEvent(tick=0, text='Channel #10 10'))
style = 0
for i in range(0, len(chordInput)):
if i % 4 == 0:
if i % 32 == 0:
drums.append(midi.NoteOnEvent(tick=1, channel=9, velocity=100, pitch=49))
drums.append(midi.NoteOffEvent(tick=quarterNote-1, channel=9, pitch=49))
else:
drums.append(midi.NoteOnEvent(tick=1, channel=9, velocity=100, pitch=36))
drums.append(midi.NoteOffEvent(tick=quarterNote-1, channel=9, pitch=36))
elif i % 4 == 2:
if i % 16 == 14:
style = 1
else:
style = 0
if style == 1:
drums.append(midi.NoteOnEvent(tick=1, channel=9, velocity=100, pitch=38))
drums.append(midi.NoteOffEvent(tick=quarterNote/4-1, channel=9, pitch=38))
drums.append(midi.NoteOnEvent(tick=1, channel=9, velocity=75, pitch=38))
drums.append(midi.NoteOffEvent(tick=quarterNote/4-1, channel=9, pitch=38))
drums.append(midi.NoteOnEvent(tick=1, channel=9, velocity=50, pitch=38))
drums.append(midi.NoteOffEvent(tick=quarterNote/4-1, channel=9, pitch=38))
drums.append(midi.NoteOnEvent(tick=1, channel=9, velocity=75, pitch=38))
drums.append(midi.NoteOffEvent(tick=quarterNote/4-1, channel=9, pitch=38))
else:
drums.append(midi.NoteOnEvent(tick=1, channel=9, velocity=80, pitch=38))
drums.append(midi.NoteOffEvent(tick=quarterNote-1, channel=9, pitch=38))
elif i % 4 == 3:
if style == 1:
drums.append(midi.NoteOnEvent(tick=1, channel=9, velocity=100, pitch=38))
drums.append(midi.NoteOffEvent(tick=quarterNote/2-1, channel=9, pitch=38))
drums.append(midi.NoteOnEvent(tick=1, channel=9, velocity=100, pitch=38))
drums.append(midi.NoteOffEvent(tick=quarterNote/2-1, channel=9, pitch=38))
else:
drums.append(midi.NoteOnEvent(tick=1, channel=9, velocity=50, pitch=42))
drums.append(midi.NoteOffEvent(tick=quarterNote/2-1, channel=9, pitch=42))
drums.append(midi.NoteOnEvent(tick=1, channel=9, velocity=35, pitch=42))
drums.append(midi.NoteOffEvent(tick=quarterNote/2-1, channel=9, pitch=42))
else:
drums.append(midi.NoteOnEvent(tick=1, channel=9, velocity=75, pitch=42))
drums.append(midi.NoteOffEvent(tick=quarterNote/2-1, channel=9, pitch=42))
drums.append(midi.NoteOnEvent(tick=1, channel=9, velocity=55, pitch=42))
drums.append(midi.NoteOffEvent(tick=quarterNote/2-1, channel=9, pitch=42))
drums.append(midi.EndOfTrackEvent(tick=quarterNote, channel=9))
midi.write_midifile(outfile, pattern)
if __name__ == "__main__":
toMidi([-1, 1, 11, 7, 14], "output.mid")