def serverSetup(device, bufsize, api='portaudio', amp=1.0): _s = Server(sr=48000, nchnls=2, buffersize=bufsize, duplex=0, audio=api) _s.setOutputDevice(device) _s.setAmp(amp) _s.boot() _s.start() return _s
def switchOn(sampleRate=48000, outputDevice=None, bufferSize=None): """You need to switch on the microphone before use, which can take several seconds. The only time you can specify the sample rate (in Hz) is during switchOn(). You can switchOff() and switchOn() with a different rate, and can `resample()` a given an `AudioCapture()` object (if one has been recorded). Considerations on the default sample rate 48kHz:: DVD or video = 48,000 CD-quality = 44,100 / 24 bit human hearing: ~15,000 (adult); children & young adult higher human speech: 100-8,000 (useful for telephone: 100-3,300) google speech API: 16,000 or 8,000 only Nyquist frequency: twice the highest rate, good to oversample a bit pyo's downsamp() function can reduce 48,000 to 16,000 in about 0.02s (uses integer steps sizes) So recording at 48kHz will generate high-quality archival data, and permit easy downsampling. outputDevice, bufferSize: set these parameters on the pyoServer before booting; None means use pyo's default values """ # imports from pyo, creates globals pyoServer t0 = core.getTime() try: global Server, Record, Input, Clean_objects, SfPlayer, serverCreated, serverBooted from pyo import Server, Record, Input, Clean_objects, SfPlayer, serverCreated, serverBooted global getVersion, pa_get_input_devices, pa_get_output_devices, downsamp, upsamp from pyo import getVersion, pa_get_input_devices, pa_get_output_devices, downsamp, upsamp global haveMic haveMic = True except ImportError: msg = 'Microphone class not available, needs pyo; see http://code.google.com/p/pyo/' logging.error(msg) raise ImportError(msg) global pyoServer if serverCreated(): pyoServer.setSamplingRate(sampleRate) else: pyoServer = Server(sr=sampleRate, nchnls=2, duplex=1) if outputDevice: pyoServer.setOutputDevice(outputDevice) if bufferSize: pyoServer.setBufferSize(bufferSize) pyoServer.boot() core.pyoServers.append(pyoServer) pyoServer.start() logging.exp('%s: switch on (%dhz) took %.3fs' % (__file__.strip('.py'), sampleRate, core.getTime() - t0))
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