def write_midi(solo=None,
chords=None,
outfile="jazzy-bot-solo.mid",
channel=0,
tempo=220):
"""
write a midi file based on solo, a list of Note objects, and chords, a
list of chord objects
"""
assert (solo or chords)
if solo and chords:
midi = MIDIFile(2, adjust_origin=False)
midi.addTempo(0, 0, tempo)
write_midi_solo(midi, 0, solo, channel)
write_midi_chords(midi, 1, chords, channel)
else:
midi = MIDIFile(1, adjust_origin=False)
midi.addTempo(0, 0, tempo)
if solo:
write_midi_solo(midi, 0, solo, channel)
elif chords:
write_midi_chords(midi, 0, chords, channel)
midi.addKeySignature(0, 0, 1, SHARPS, MAJOR)
with open(outfile, "wb") as f:
midi.writeFile(f)
def to_midi_file(self, file):
midi = MIDIFile(1)
midi.addTempo(0, 0, self.tempo)
midi.addTimeSignature(0, 0, self.time_signature[0],
int(np.sqrt(self.time_signature[1])), 24)
if self.key.scale == Scale.MAJOR:
mode = midiutil.MAJOR
else:
mode = midiutil.MINOR
if self.key.get_circle_of_fifths()[1] == 'Sharps':
accidental_type = midiutil.SHARPS
else:
accidental_type = midiutil.FLATS
midi.addKeySignature(0, 0,
self.key.get_circle_of_fifths()[0],
accidental_type, mode)
for note in self.notes:
midi.addNote(0, 0, note.pitch.midi_number,
note.duration.start_beat * 4,
note.duration.total_beat * 4, utils.MIDI_VOLUME)
with open(file, "wb") as output_file:
midi.writeFile(output_file)
def make_midi(tbon, outfile, firstbar=0, quiet=False, metronome=0):
"""
Parse and evaluate the source string. Write the output
to the specified outfile name.
kwargs:
transpose -- Number of semitones to transpose the output.
May be positive or negative.
volume -- MIDI track volume
track -- Midi file track number
channel -- MIDI channel number
octave -- Initial MIDI octave number (0 - 10)
numeric -- tbon notation can be either named pitches (cdefgab) or
numbers (1234567) with 1 corresponding to 'c'.
"""
parts = tbon.output
numparts = len(parts)
print("Found {} parts".format(numparts))
metronotes = tbon.metronome_output
if metronome == 0:
numTracks = numparts
elif metronome == 1:
numTracks = 1
else:
numTracks = 1 + numparts
meta = tbon.meta_output
beat_map = tbon.beat_map
MyMIDI = MIDIFile(numTracks,
adjust_origin=True,
removeDuplicates=False,
deinterleave=False)
#MyMIDI.addTempo(track, 0, tempo)
trk0 = 0
for m in meta:
if m[0] == 'T':
MyMIDI.addTempo(trk0, m[1], m[2])
elif m[0] == 'K' and metronome != 1:
time = m[1]
sf, mi = m[2]
track = m[3]
mode = MINOR if mi == 1 else MAJOR
accidentals = abs(sf)
acc_type = SHARPS if sf > 0 else FLATS
#print("Inserting key signature at time {}".format(time))
#print(accidentals, acc_type, mode)
MyMIDI.addKeySignature(track, time, accidentals, acc_type, mode)
elif m[0] == 'M':
## Time signature
time = m[1]
numerator = m[2]
denominator = m[3]
track = m[4]
## midi denominator specified a power of 2
midi_denom = {2: 1, 4: 2, 8: 3, 16: 4}[denominator]
## We want to make the midi metronome match beat duration.
## This requires recognizing compound meters
## See http://midiutil.readthedocs.io/en/1.1.3/class.html
## for discussion of arguments to addTimeSignature()
## including clocks_per_tick.
if denominator == 16 and (numerator % 3 == 0):
metro_clocks = 18
elif denominator == 16:
metro_clocks = 6
elif denominator == 8 and (numerator % 3 == 0):
metro_clocks = 36
elif denominator == 8:
metro_clocks = 12
elif denominator == 4:
metro_clocks = 24
elif denominator == 2:
metro_clocks = 48
MyMIDI.addTimeSignature(track,
time,
numerator,
denominator=midi_denom,
clocks_per_tick=metro_clocks)
elif m[0] == 'I' and metronome != 1:
## Instrument change
time = m[1]
instrument = m[2] - 1 ## convert to 0 index
track = m[3] + 1
chan = m[4] - 1
MyMIDI.addProgramChange(track, chan, time, instrument)
def add_notes(source, trk):
""" Add all notes in source to trk on chan. """
for pitch, start, stop, velocity, chan in source:
if pitch is not None:
MyMIDI.addNote(trk, chan - 1, pitch, start, stop - start,
int(velocity * 127))
if metronome == 0:
for track, notes in enumerate(parts):
add_notes(notes, track)
elif metronome == 1:
## Metronome output only.
add_notes(metronotes, trk0)
else:
## Both
for track, notes in enumerate(parts):
add_notes(notes, track)
metrotrack = numparts ## because 0-indexing
add_notes(metronotes, metrotrack)
with open(outfile, "wb") as output_file:
MyMIDI.writeFile(output_file)
if not quiet:
for partnum, pmap in beat_map.items():
print_beat_map(partnum, pmap, first_bar_number=firstbar)
