def __init__(self, music_player, wavetype=LEAD, volume=.7, reverb_mix=.1,
notes=None):
""" Create new WaveInstrument
Arguments
music_player: Parent MusicPlayer of this instrument
"""
Instrument.__init__(self, music_player, volume, reverb_mix, notes)
self.names = ["C", "B", "A", "G", "F", "E", "D", "C"]
self.wavetype = wavetype
if (self.wavetype == self.BASS):
table = SquareTable()
self.frequencies = [(freq / 4) for freq in self.C_FREQUENCIES]
elif (self.wavetype == self.LEAD):
table = CosTable()
self.frequencies = self.C_FREQUENCIES
self.generator_cutoff = True
# Generate oscillators for every pitch, feed into mixer
self.oscillators = []
for i in range(0, music_player.NUM_ROWS):
oscillator = Osc(table=table, freq=self.frequencies[i])
oscillator.stop()
self.row_generators.append(oscillator)
self.mixer.addInput(i, oscillator)
self.mixer.setAmp(i, 0, (1.0 / self.LIMITING_FACTOR))
pre_effect = self.mixer[0]
if (self.wavetype == self.BASS):
distorted = Disto(pre_effect)
volume_reducer = Mixer(outs=1)
volume_reducer.addInput(0, distorted)
volume_reducer.setAmp(0, 0, 0.3)
post_effect = volume_reducer[0]
elif (self.wavetype == self.LEAD):
#chorus = Chorus(pre_effect)
#post_effect = chorus
post_effect = pre_effect
else:
post_effect = pre_effect
# Apply reverb to omixer
self.reverb_out = WGVerb(post_effect, feedback=0.8, cutoff=3500,
bal=self.reverb_mix)
#use generator.setBal(x) to modify reverb
self.generator = self.reverb_out
def mixer_setup(self):
# Combine all tracks in mixer
self.track_mixer = Mixer(outs=1)
for inst_index in range(0, len(self.instruments)):
instrument = self.instruments[inst_index]
generator = instrument.get_generator()
self.track_mixer.addInput(inst_index, generator)
self.track_mixer.setAmp(inst_index, 0, instrument.get_volume())
# Prepare master output
self.master_out = Mixer(outs=1, chnls=2)
self.master_out.addInput(0, self.track_mixer[0])
self.master_out.setAmp(0, 0, self.global_volume)
self.master_out.out()
def __init__(self, music_player, volume, reverb_mix, notes):
""" Create generic Instrument
Arguments:
music_player: Parent MusicPlayer of this instrument
"""
self.music_player = music_player
self.reverb_mix = reverb_mix
# This field is just for storage. Volume is taken care of in
# the MusicPlayer's mixer
self.volume = volume
# Initialize notes array to all zeroes if no notes input as argument
if notes == None:
self.notes = []
for beat_index in range(0, music_player.NUM_BEATS):
beat_column = []
for row_index in range(0, music_player.NUM_ROWS):
beat_column.append(0)
self.notes.append(beat_column)
else:
self.notes = notes
# For generating sound
self.row_generators = []
self.reverb_out = None
self.mixer = Mixer(outs=1)
# For GUI purposes, override this
self.names = []
def add_modules_to_mixer(self, mixer: pyo.Mixer) -> None:
for module in self.modules:
for (
physical_output,
mixer_channel,
) in settings.MODULE_MIXER2CHANNEL_MAPPING.items():
track_mixer_number = (
settings.TRACK2MIXER_NUMBER_MAPPING["{}_{}".format(
module.name,
physical_output.split("_")[1])], )
mixer.addInput(
track_mixer_number,
module.mixer[mixer_channel][0],
)
mixer.setAmp(
track_mixer_number,
settings.PHYSICAL_OUTPUT2CHANNEL_MAPPING[physical_output],
1,
)
class Instrument:
"""This class holds the sound generator and playback parameters for a track"""
SECONDS_PER_MIN = 60
def __init__(self, music_player, volume, reverb_mix, notes):
""" Create generic Instrument
Arguments:
music_player: Parent MusicPlayer of this instrument
"""
self.music_player = music_player
self.reverb_mix = reverb_mix
# This field is just for storage. Volume is taken care of in
# the MusicPlayer's mixer
self.volume = volume
# Initialize notes array to all zeroes if no notes input as argument
if notes == None:
self.notes = []
for beat_index in range(0, music_player.NUM_BEATS):
beat_column = []
for row_index in range(0, music_player.NUM_ROWS):
beat_column.append(0)
self.notes.append(beat_column)
else:
self.notes = notes
# For generating sound
self.row_generators = []
self.reverb_out = None
self.mixer = Mixer(outs=1)
# For GUI purposes, override this
self.names = []
def __del__(self):
pass
def get_generator(self):
return self.generator
def get_names(self):
return self.names
def pause(self):
self.mixer.stop()
def set_note(self, note):
beat_index = note.page_index * self.music_player.NUM_COLS +\
note.column
beat_col = self.notes[beat_index]
if note.turn_on == True:
beat_col[note.row] = 1
elif note.turn_on == False:
beat_col[note.row] = 0
def get_volume(self):
return self.volume
def set_volume(self, new_volume):
self.volume = new_volume
def get_reverb(self):
return self.reverb_mix
def set_reverb(self, new_reverb):
self.reverb_mix = new_reverb
self.reverb_out.setBal(new_reverb)
def get_page(self, page_index):
""" Get a page of notes with <row, col> indexing """
start_column = page_index * self.music_player.NUM_COLS
end_column = start_column + (self.music_player.NUM_COLS - 1)
page_notes = []
for row_index in range(0, self.music_player.NUM_ROWS):
row_notes = []
for col_index in range(start_column, end_column + 1):
row_notes.append(self.notes[col_index][row_index])
page_notes.append(row_notes)
return page_notes
"""Abstract methods: override these for your instrument"""
def play_step(self):
pass
def get_data(self):
pass
class MusicPlayer:
"""Playback engine for sequencer samples and sounds"""
NUM_PAGES = 8
NUM_ROWS = 8
NUM_COLS = 8
NUM_TRACKS = 3
NUM_BEATS = NUM_PAGES * NUM_COLS
SECONDS_PER_MIN = 60.0
# Parameters for GUI to build sliders
MIN_TEMPO = 40.0
MAX_TEMPO = 240.0
MIN_VOLUME = 0.0
MAX_VOLUME = 1.0
MIN_REVERB = 0.0
MAX_REVERB = 1.0
# Instrument descriptive constants
WAVETABLE_A = 0
WAVETABLE_B = 1
DRUM_KIT = 2
def __init__(self):
"""Constructor for music_player"""
"""Make sure to call add_gui once initialized"""
self.instruments = [] #instrument/track volume is here
self.tempo = 120.0 #BPM (for now)
self.global_volume = 0.75 #between 0 and 1
self.page_index = 0 #1st page
self.play_all = False
self.playhead_index = 0
self.beat_index = 0
self.server = Server(duplex=0)
"""Set proper output device for latency-free playback on Windows"""
"""Source: https://groups.google.com/d/msg/pyo-discuss/9fvFiGbch3c/tzJTfbpLUY8J"""
if platform.system() == "Windows":
out_devices = pa_get_output_devices()
od_index = 0
for od in out_devices[0]:
if "Primary Sound Driver" in od:
pai = int(out_devices[1][od_index])
self.server.setOutputDevice(pai)
break
od_index += 1
self.server.boot()
self.server.start()
metronome_time = self.SECONDS_PER_MIN / self.tempo
self.metronome = Metro(time=metronome_time)
self.metronome_callback = TrigFunc(self.metronome, function=self.step)
# Create instruments
wavetable_a = WaveInstrument(self, WaveInstrument.BASS)
wavetable_b = WaveInstrument(self, WaveInstrument.LEAD)
drums = DrumInstrument(self)
self.instruments.append(wavetable_a)
self.instruments.append(wavetable_b)
self.instruments.append(drums)
self.mixer_setup()
def mixer_setup(self):
# Combine all tracks in mixer
self.track_mixer = Mixer(outs=1)
for inst_index in range(0, len(self.instruments)):
instrument = self.instruments[inst_index]
generator = instrument.get_generator()
self.track_mixer.addInput(inst_index, generator)
self.track_mixer.setAmp(inst_index, 0, instrument.get_volume())
# Prepare master output
self.master_out = Mixer(outs=1, chnls=2)
self.master_out.addInput(0, self.track_mixer[0])
self.master_out.setAmp(0, 0, self.global_volume)
self.master_out.out()
def add_gui(self, gui):
""" Sets the GUI that this music player must instruct to update playhead.
Must be called right after constructor before operation.
Arguments:
gui: GUI object monitoring this player
"""
self.gui = gui
def terminate(self):
"""Terminate MusicPlayer server in preparation for shutdown"""
self.server.stop()
self.server.shutdown()
def step(self):
""" Step the music player through next beat """
# Set GUI to reflect current beat
self.gui.update_playhead()
# Play step for instruments
for instrument in self.instruments:
instrument.play_step()
# For next iteration, increment playhead and beat indices
self.playhead_index = (self.playhead_index + 1) % self.NUM_COLS
if (self.play_all == True):
self.beat_index = (self.beat_index + 1) % self.NUM_BEATS
elif (self.play_all == False):
self.beat_index = (self.page_index * self.NUM_COLS) +\
self.playhead_index
def add_network_handler(self, network_handler):
self.network_handler = network_handler
"""playback methods"""
def play(self):
self.metronome.play()
def pause(self):
for instrument in self.instruments:
instrument.pause()
self.metronome.stop()
def set_session(self, session):
"""used to load a session into the music player"""
# Reload pertinent MusicPlayer variables
self.set_tempo(session.tempo)
# Reconstruct each instrument from session data
self.instruments = []
instrument_data = session.instrument_data
for data in instrument_data:
volume = data.volume
reverb_mix = data.reverb_mix
notes = data.notes
if isinstance(data, WaveInstrumentData):
wavetype = data.wavetype
wave_instrument = WaveInstrument(self, wavetype, volume,
reverb_mix, notes)
self.instruments.append(wave_instrument)
elif isinstance(data, DrumInstrumentData):
drum_instrument = DrumInstrument(self, volume, reverb_mix,
notes)
self.instruments.append(drum_instrument)
# Reload mixer to reflect new instruments
self.mixer_setup()
""" Modifiers """
def set_note(self, note):
instrument = self.instruments[note.track_id]
instrument.set_note(note)
def set_global_volume(self, volume):
self.global_volume = volume
self.master_out.setAmp(0, 0, volume)
def set_volume(self, track_id, volume):
self.instruments[track_id].set_volume(volume)
self.track_mixer.setAmp(track_id, 0, volume)
def set_reverb(self, track_id, reverb):
self.instruments[track_id].set_reverb(reverb)
def set_tempo(self, new_tempo):
new_time = self.SECONDS_PER_MIN / new_tempo
self.metronome.setTime(new_time)
self.tempo = new_tempo
"""getter methods"""
def get_session(self):
"""Get descriptive MusicPlayer session to restore later"""
session = Session(self, self.instruments)
return session
"""getter methods for GUI"""
def get_names(self, track_id):
return self.instruments[track_id].get_names()
def get_reverb(self, track_id):
return self.instruments[track_id].get_reverb()
def get_volume(self, track_id):
return self.instruments[track_id].get_volume()
def get_global_volume(self):
return self.global_volume
def get_tempo(self):
return self.tempo
def get_note(self, track_id, page_index, position, pitch):
pass
def get_current_page(self, track_id):
instrument = self.instruments[track_id]
notes = instrument.get_page(self.page_index)
return notes
