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
from MidiOutFile import MidiOutFile """ This is an example of the smallest possible type 0 midi file, where all the midi events are in the same track. """ out_file = '../minimal_type0.mid' midi = MidiOutFile(out_file) # non optional midi framework midi.header(format=1) midi.start_of_track() # musical events import ipdb;ipdb.set_trace() midi.update_time(10) midi.note_on(channel=0, note=0x40) midi.update_time(0) 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)
def note_off(self, channel=0, note=0, velocity=0):
if channel == 0:
print "Off with note ", note, " with duration ", self.currTime - self.notes[
note]
self.notes[note] = 0
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!
"""
This is an example of the smallest possible type 0 midi file, where
all the midi events are in the same track.
"""
out_file = '../prueba.mid'
ntracks= 3
midi = MidiOutFile(out_file)
# non optional midi framework
midi.header(format= 1, nTracks=ntracks)
# musical events
#import ipdb;ipdb.set_trace()
for i in xrange(0,ntracks):
midi.start_of_track(i)
#midi.continuous_controller(i,RESET_ALL_CONTROLLERS,0x01)
#midi.continuous_controller(i,CHANNEL_VOLUME,0x32)
midi.update_time(192*i)
midi.note_on(channel=i, note=0x40)
midi.update_time(192*(i+1))
midi.note_off(channel=i, note=0x40)
#midi.update_time(0)
midi.end_of_track()
midi.eof()
