def midiwrite(filename, piano_roll, r=(21, 109), dt=32, patch=0):
midi = MidiOutFile(filename)
midi.header(division=128)
midi.start_of_track()
midi.patch_change(channel=0, patch=patch)
t = 0
samples = [i.nonzero()[0] + r[0] for i in piano_roll]
for i in xrange(len(samples)):
for f in samples[i]:
if (i==0
or f not in samples[i-1]
or i%4 == 0):
midi.update_time(t)
midi.note_on(channel=0, note=f, velocity=90)
t = 0
t += int(dt)
for f in samples[i]:
if (i==len(samples)-1
or f not in samples[i+1]
or i%4 == 3):
midi.update_time(t)
midi.note_off(channel=0, note=f, velocity=0)
t = 0
midi.update_time(0)
midi.end_of_track()
midi.eof()
def midiwrite(filename, piano_roll, r=(21, 109), dt=0.2, patch=0):
midi = MidiOutFile(filename)
midi.header(division=100)
midi.start_of_track()
midi.patch_change(channel=0, patch=patch)
t = 0
samples = [i.nonzero()[0] + r[0] for i in piano_roll]
for i in xrange(len(samples)):
for f in samples[i]:
if i==0 or f not in samples[i-1]:
midi.update_time(t)
midi.note_on(channel=0, note=f, velocity=90)
t = 0
t += int(dt*200)
for f in samples[i]:
if i==len(samples)-1 or f not in samples[i+1]:
midi.update_time(t)
midi.note_off(channel=0, note=f, velocity=0)
t = 0
midi.update_time(0)
midi.end_of_track()
midi.eof()
class MidiWrapper:
def __init__(self):
self.file = None
self.eventQueue = []
def createFile(self, filename):
self.file = MidiOutFile(filename)
self.file.header()
self.file.start_of_track()
def addNote(self, pitch, octave, time, duration, channel=0):
if not self.file:
print "Error - outfile has not been created yet! Use MidiWrapper.createFile(1) to make the file first."
return
file = self.file
octaveOffset = ((octave + 1) * 12) - 3 # Middle C (C4) is 0x3C = 60
noteNum = self._pitchToHex(pitch) + octaveOffset
self.eventQueue.append((time, "on", (noteNum, channel)))
self.eventQueue.append((time + duration, "off", (noteNum, channel)))
def _pitchToHex(self, pitch):
choices = {"A": 0, "B": 2, "C": 3, "D": 5, "E": 7, "F": 8, "G": 10}
accidental = None
if len(pitch) > 1:
accidental = pitch[1]
pitch = pitch[0]
return choices[pitch] + (1 if accidental else 0)
def finalize(self):
if not self.file:
print "Error - outfile has not been created yet! Use MidiWrapper.createFile(1) to make the file first."
return
self.eventQueue.sort(cmp=lambda x, y: int.__cmp__(x[0], y[0]))
file = self.file
for tuple in self.eventQueue:
time, op, dataTuple = tuple
file.update_time(time, 0)
if op == "on":
file.update_time(time, 0)
noteNum, channel = dataTuple
file.note_on(channel, noteNum)
else:
noteNum, channel = dataTuple
file.note_off(channel, noteNum)
# non optional midi framework
self.file.update_time(0)
self.file.end_of_track() # not optional!
self.file.eof()
return self.file
class MidiWrapper:
def __init__(self):
self.file = None
self.eventQueue = []
def createFile(self, filename):
self.file = MidiOutFile(filename)
self.file.header()
self.file.start_of_track()
def addNote(self, pitch, octave, time, duration, channel=0):
if not self.file:
print "Error - outfile has not been created yet! Use MidiWrapper.createFile(1) to make the file first."
return
file = self.file
octaveOffset = ((octave + 1) * 12) - 3 # Middle C (C4) is 0x3C = 60
noteNum = self._pitchToHex(pitch) + octaveOffset
self.eventQueue.append((time, "on", (noteNum, channel)))
self.eventQueue.append((time+duration, "off", (noteNum, channel)))
def _pitchToHex(self, pitch):
choices = {"A": 0, "B": 2, "C":3, "D":5, "E":7, "F":8, "G":10}
accidental = None
if len(pitch) > 1:
accidental = pitch[1]
pitch = pitch[0]
return choices[pitch] + (1 if accidental else 0)
def finalize(self):
if not self.file:
print "Error - outfile has not been created yet! Use MidiWrapper.createFile(1) to make the file first."
return
self.eventQueue.sort(cmp=lambda x, y : int.__cmp__(x[0], y[0]))
file = self.file
for tuple in self.eventQueue:
time, op, dataTuple = tuple
file.update_time(time,0)
if op == "on":
file.update_time(time,0)
noteNum, channel= dataTuple
file.note_on(channel, noteNum)
else:
noteNum, channel = dataTuple
file.note_off(channel, noteNum)
# non optional midi framework
self.file.update_time(0)
self.file.end_of_track() # not optional!
self.file.eof()
return self.file
midi.note_on(channel=0, note=0x41) midi.update_time(192) midi.note_off(channel=0, note=0x40) midi.update_time(0) midi.note_off(channel=0, note=0x41) midi.update_time(0) midi.note_off(channel=0, note=0x42) midi.update_time(0) midi.note_off(channel=0, note=0x43) midi.update_time(0) midi.note_off(channel=0, note=0x44) midi.update_time(0) midi.note_off(channel=0, note=0x45) midi.update_time(0) midi.note_off(channel=0, note=0x46) midi.update_time(0) midi.note_off(channel=0, note=0x47) midi.update_time(0) midi.note_off(channel=0, note=0x48) midi.update_time(0) midi.note_off(channel=0, note=0x49) midi.update_time(0) # non optional midi framework midi.update_time(0) midi.end_of_track() midi.eof()
event_handler = NoteOnPrinter() in_file = 'test.mid' out_file = 'test.mid' midi = MidiOutFile(out_file) # non optional midi framework midi.header(division=96) midi.start_of_track() # musical events midi.tempo(60000000 / 60) midi.update_time(0) midi.note_on(channel=0, note=69) midi.update_time(96) midi.note_on(channel=0, note=73) midi.update_time(96) midi.note_off(channel=0, note=69) midi.update_time(96) midi.note_off(channel=0, note=73) # non optional midi framework midi.update_time(0) midi.end_of_track() # not optional! midi.eof() midi_in = MidiInFile(event_handler, in_file) midi_in.read()
