Esempio n. 1
0
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)
Esempio n. 2
0
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)
Esempio n. 3
0
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'))