class Midi(object):
def __init__(self, number_tracks=1, tempo=60, instrument=0):
"""
instrument: can be an integer or a list
"""
self.number_tracks = number_tracks
self.midi_data = MIDIFile(number_tracks)
for track in range(number_tracks):
self.midi_data.addTrackName(track, 0, "Track {0}".format(track))
self.midi_data.addTempo(track, 0, tempo)
instr = instrument[track] if isinstance(instrument,
list) else instrument
self.midi_data.addProgramChange(track, 0, 0, instr)
def seq_chords(self, seqlist, track=0, time=0):
if track + 1 > self.number_tracks:
raise MidiError("You are trying to use more tracks than we have.")
for item in seqlist:
if isinstance(item, NoteSeq):
volume = item[0].volume
dur = item[0].midi_dur
for note in item:
self.midi_data.addNote(track, 0, note.midi_number, time,
dur, volume)
time += dur
elif isinstance(item, Rest):
time += item.midi_dur
else:
raise MidiError(
"The input should be a list of NoteSeq but yours is a {0}: {1}"
.format(type(seqlist), seqlist))
return time
def seq_notes(self, noteseq, track=0, time=0):
if track + 1 > self.number_tracks:
raise MidiError("You are trying to use more tracks than we have.")
for note in noteseq:
if isinstance(note, Note):
self.midi_data.addNote(track, 0, note.midi_number, time,
note.midi_dur, note.volume)
else:
# we ignore the rests
pass
time += note.midi_dur
return time
def write(self, filename):
if isinstance(filename, str):
with open(filename, 'wb') as midifile:
self.midi_data.writeFile(midifile)
else:
self.midi_data.writeFile(filename)
class Midi(object):
def __init__(self, number_tracks=1, tempo=60, instrument=0):
"""
instrument: can be an integer or a list
"""
self.number_tracks = number_tracks
self.midi_data = MIDIFile(number_tracks)
for track in range(number_tracks):
self.midi_data.addTrackName(track, 0, "Track {0}".format(track))
self.midi_data.addTempo(track, 0, tempo)
instr = instrument[track] if isinstance(instrument, list) else instrument
self.midi_data.addProgramChange(track, 0, 0, instr)
def seq_chords(self, seqlist, track=0, time=0):
if track + 1 > self.number_tracks:
raise MidiError("You are trying to use more tracks than we have.")
for item in seqlist:
if isinstance(item, NoteSeq):
volume = item[0].volume
dur = item[0].midi_dur
for note in item:
self.midi_data.addNote(track, 0, note.midi_number, time, dur, volume)
time += dur
elif isinstance(item, Rest):
time += item.midi_dur
else:
raise MidiError(
"The input should be a list of NoteSeq but yours is a {0}: {1}".format(type(seqlist), seqlist)
)
return time
def seq_notes(self, noteseq, track=0, time=0):
if track + 1 > self.number_tracks:
raise MidiError("You are trying to use more tracks than we have.")
for note in noteseq:
if isinstance(note, Note):
self.midi_data.addNote(track, 0, note.midi_number, time, note.midi_dur, note.volume)
else:
# we ignore the rests
pass
time += note.midi_dur
return time
def write(self, filename):
if isinstance(filename, str):
with open(filename, "wb") as midifile:
self.midi_data.writeFile(midifile)
else:
self.midi_data.writeFile(filename)
def popcnt(x):
return bin(x).count('1')
def toscale(scale, note): # todo: totally broken
poct = popcnt(scale)
n = note % (poct + 1)
c = 0
o = 0
for i in format(scale, '012b'):
if i == '1':
c += 1
if c - 1 == n:
break
o += 1
return o + note // 12 * 12
scale = int('101001010100', 2)
m.addProgramChange(0, 0, 0, 65)
m.addProgramChange(1, 1, 0, 63)
for t in range(2048):
if t % 64 == 0:
scale = (scale >> 9) | ((scale & ((1 << 11) - 1)) << 3)
writeNote(0, 0,
toscale(scale, (t // 2 & t // 5 | t // 8 & t // 16) % 36 + 60),
t / 8, 1 / 8, 127)
writeNote(1, 1, toscale(scale, (t // 5 | t // 8 | t // 16) % 12 + 36),
t / 8, 1 / 8, 127)
m.writeFile(open('out.mid', 'wb'))
n = note % (poct + 1)
c = 0
o = 0
for i in format(scale, '012b'):
if i == '1':
c += 1
if c - 1 == n:
break
o += 1
return o + note // 12 * 12
scale = int('101001010100', 2)
# set instruments
m.addProgramChange(0, 0, 0, 5)
m.addProgramChange(1, 1, 0, 63)
m.addProgramChange(2, 2, 0, 5)
m.addProgramChange(3, 3, 0, 5)
m.addProgramChange(4, 4, 0, 5)
m.addProgramChange(5, 5, 0, 116)
m.addProgramChange(6, 6, 0, 117)
m.addProgramChange(7, 7, 0, 118)
t = 0
dt = 0
for _ in range(65536):
if dt % 64 == 0:
shift = 1
scale = (scale >> (12 - shift)) | ((scale & ((1 << 11) - 1)) << shift)
sh = 4
