def add_defaults(single_track, defaults=master_defaults):
time_signature = MetaMessage("time_signature")
time_signature.numerator = defaults["time_signature.numerator"]
time_signature.denominator = defaults["time_signature.denominator"]
time_signature.clocks_per_click = defaults["time_signature.clocks_per_click"]
time_signature.notated_32nd_notes_per_beat = defaults["time_signature.notated_32nd_notes_per_beat"]
key_signature = MetaMessage("key_signature")
key_signature.key = defaults["key_signature.key"]
set_tempo = MetaMessage("set_tempo")
set_tempo.tempo = defaults["set_tempo.tempo"]
msgs = [time_signature, key_signature, set_tempo]
msgs.extend(single_track)
msgs.append(MetaMessage('end_of_track'))
return MidiTrack(msgs)
def add_defaults(single_track):
time_signature = MetaMessage("time_signature")
time_signature.numerator = 4
time_signature.denominator = 2 #quattro quarti
time_signature.clocks_per_click = 24
time_signature.notated_32nd_notes_per_beat = 8
key_signature = MetaMessage("key_signature")
key_signature.key = 'C' # C major
set_tempo = MetaMessage("set_tempo")
set_tempo.tempo = 400000 #500000 # 120bpm
msgs = [time_signature, key_signature, set_tempo]
msgs.extend(single_track)
msgs.append(MetaMessage('end_of_track'))
return MidiTrack(msgs)
def encoding_to_message(encoding, decodings, defaults=master_defaults):
message = decodings[encoding]
if message == "START_TRACK":
#header defaults
time_signature = MetaMessage("time_signature")
time_signature.numerator = defaults["time_signature.numerator"]
time_signature.denominator = defaults["time_signature.denominator"]
time_signature.clocks_per_click = defaults[
"time_signature.clocks_per_click"]
time_signature.notated_32nd_notes_per_beat = defaults[
"time_signature.notated_32nd_notes_per_beat"]
key_signature = MetaMessage("key_signature")
key_signature.key = defaults["key_signature.key"]
set_tempo = MetaMessage("set_tempo")
set_tempo.tempo = defaults["set_tempo.tempo"]
return [time_signature, key_signature, set_tempo]
if message == "END_TRACK":
return [MetaMessage('end_of_track')]
if message == "WAIT_A_BEAT":
return [message]
if message.startswith("note"):
parts = message.split("-")
res = Message(parts[0])
res.note = int(parts[1])
res.time = int(parts[2])
# defaults
res.channel = defaults["note.channel"]
res.velocity = defaults["note.velocity"]
return [res]
return []
def timesteps_to_midi(timesteps, zeros=0, ones=1, defaults=master_defaults):
o = zeros
l = ones
messages = []
#HEADER
time_signature = MetaMessage("time_signature")
time_signature.numerator = defaults["time_signature.numerator"]
time_signature.denominator = defaults["time_signature.denominator"]
time_signature.clocks_per_click = defaults[
"time_signature.clocks_per_click"]
time_signature.notated_32nd_notes_per_beat = defaults[
"time_signature.notated_32nd_notes_per_beat"]
key_signature = MetaMessage("key_signature")
key_signature.key = defaults["key_signature.key"]
set_tempo = MetaMessage("set_tempo")
set_tempo.tempo = defaults["set_tempo.tempo"]
messages.extend([time_signature, key_signature, set_tempo])
state_vectors = {
"NOTE": [o, o],
"START_TRACK": [l, o],
"END_TRACK": [o, l]
}
silence = [o for i in range(128)] + state_vectors["NOTE"]
wait = 0
last_timestep = silence
def timestep_diffs(timestep1, timestep2):
res = []
for i, t1 in enumerate(timestep1):
diff = timestep1[i] - timestep2[i]
if diff != 0:
res.append(i)
return res
for timestep in timesteps:
diffs = timestep_diffs(timestep[:128], last_timestep[:128])
if (len(diffs) == 0):
wait += 1
else:
for d in diffs:
if last_timestep[d] == o and timestep[d] == l:
message = Message("note_on",
note=d,
time=wait,
channel=defaults["note.channel"],
velocity=defaults["note.velocity"])
messages.append(message)
wait = 0
elif last_timestep[d] == l and timestep[d] == o:
message = Message("note_off",
note=d,
time=wait,
channel=defaults["note.channel"])
messages.append(message)
wait = 0
last_timestep = timestep
messages.append(MetaMessage('end_of_track', time=wait))
wait = 0
mid = MidiFile(ticks_per_beat=defaults["ticks_per_beat"])
mid.tracks.append(MidiTrack(messages))
return mid