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'))
