class SoundEngine:
def __init__(
self, samples_to_load: Dict[str, Tuple[Union[str, Sample],
int]]) -> None:
global samples
samples.clear()
self.output = Output(mixing="mix")
if any(isinstance(smp, str) for smp, _ in samples_to_load.values()):
print("Loading sound files...")
for name, (filename, max_simultaneously) in samples_to_load.items():
if isinstance(filename, Sample):
samples[name] = filename
else:
data = pkgutil.get_data(__name__, "sounds/" + filename)
if data:
tmp = tempfile.NamedTemporaryFile(delete=False,
suffix=".ogg")
try:
tmp.write(data)
tmp.close()
samples[name] = Sample(
streaming.AudiofileToWavStream(tmp.name),
name).stereo()
finally:
os.remove(tmp.name)
else:
raise SystemExit("corrupt package; sound data is missing")
self.output.set_sample_play_limit(name, max_simultaneously)
print("Sound API initialized:", self.output.audio_api)
def play_sample(self, samplename, repeat=False, after=0.0):
self.output.play_sample(samples[samplename], repeat, after)
def silence(self, sid_or_name=None):
if sid_or_name:
self.output.stop_sample(sid_or_name)
else:
self.output.silence()
def close(self):
self.output.close()
class SynthGUI(tk.Frame):
def __init__(self, master=None):
super().__init__(master)
self.master.title("Software FM/PWM Synthesizer | synthplayer lib v" + synthplayer.__version__)
self.waveform_area = tk.Frame(self)
self.osc_frame = tk.Frame(self)
self.oscillators = []
self.piano_frame = tk.Frame(self)
self.pianokeys_gui = PianoKeyboardGUI(self.piano_frame, self)
self.pianokeys_gui.pack(side=tk.BOTTOM)
filter_frame = tk.LabelFrame(self, text="Filters etc.", padx=10, pady=10)
self.envelope_filter_guis = [
EnvelopeFilterGUI(filter_frame, "1", self),
EnvelopeFilterGUI(filter_frame, "2", self),
EnvelopeFilterGUI(filter_frame, "3", self)]
self.echo_filter_gui = EchoFilterGUI(filter_frame, self)
for ev in self.envelope_filter_guis:
ev.pack(side=tk.LEFT, anchor=tk.N)
self.arp_filter_gui = ArpeggioFilterGUI(filter_frame, self)
self.arp_filter_gui.pack(side=tk.LEFT, anchor=tk.N)
f = tk.Frame(filter_frame)
self.tremolo_filter_gui = TremoloFilterGUI(f, self)
self.tremolo_filter_gui.pack(side=tk.TOP)
lf = tk.LabelFrame(f, text="A4 tuning")
lf.pack(pady=(4, 0))
lf = tk.LabelFrame(f, text="Performance")
self.samplerate_choice = tk.IntVar()
self.samplerate_choice.set(22050)
tk.Label(lf, text="Samplerate:").pack(anchor=tk.W)
subf = tk.Frame(lf)
tk.Radiobutton(subf, variable=self.samplerate_choice, value=44100, text="44.1 kHz",
fg=lf.cget('fg'), selectcolor=lf.cget('bg'), pady=0, command=self.create_synth).pack(side=tk.LEFT)
tk.Radiobutton(subf, variable=self.samplerate_choice, value=22050, text="22 kHz",
fg=lf.cget('fg'), selectcolor=lf.cget('bg'), pady=0, command=self.create_synth).pack(side=tk.LEFT)
subf.pack()
tk.Label(lf, text="Piano key response:").pack(anchor=tk.W)
subf = tk.Frame(lf)
self.rendering_choice = tk.StringVar()
self.rendering_choice.set("realtime")
tk.Radiobutton(subf, variable=self.rendering_choice, value="realtime", text="realtime", pady=0,
fg=lf.cget('fg'), selectcolor=lf.cget('bg'),).pack(side=tk.LEFT)
tk.Radiobutton(subf, variable=self.rendering_choice, value="render", text="render", pady=0,
fg=lf.cget('fg'), selectcolor=lf.cget('bg'),).pack(side=tk.LEFT)
subf.pack()
lf.pack(pady=(4, 0))
f.pack(side=tk.LEFT, anchor=tk.N)
self.echo_filter_gui.pack(side=tk.LEFT, anchor=tk.N)
misc_frame = tk.Frame(filter_frame, padx=10)
tk.Label(misc_frame, text="To Speaker:").pack(pady=(5, 0))
self.to_speaker_lb = tk.Listbox(misc_frame, width=8, height=5, selectmode=tk.MULTIPLE, exportselection=0)
self.to_speaker_lb.pack()
lf = tk.LabelFrame(misc_frame, text="A4 tuning")
self.a4_choice = tk.IntVar()
self.a4_choice.set(440)
tk.Radiobutton(lf, variable=self.a4_choice, value=440, text="440 Hz", pady=0, fg=lf.cget('fg'), selectcolor=lf.cget('bg')).pack()
tk.Radiobutton(lf, variable=self.a4_choice, value=432, text="432 Hz", pady=0, fg=lf.cget('fg'), selectcolor=lf.cget('bg')).pack()
lf.pack(pady=(4, 0))
tk.Button(misc_frame, text="Load preset", command=self.load_preset).pack()
tk.Button(misc_frame, text="Save preset", command=self.save_preset).pack()
for _ in range(5):
self.add_osc_to_gui()
self.to_speaker_lb.select_set(4)
self.waveform_area.pack(side=tk.TOP)
self.osc_frame.pack(side=tk.TOP, padx=10)
filter_frame.pack(side=tk.TOP)
misc_frame.pack(side=tk.RIGHT, anchor=tk.N)
self.piano_frame.pack(side=tk.TOP, padx=10, pady=10)
self.statusbar = tk.Label(self, text="<status>", relief=tk.RIDGE)
self.statusbar.pack(side=tk.BOTTOM, fill=tk.X)
self.pack()
self.synth = self.output = None
self.create_synth()
self.echos_ending_time = 0
self.currently_playing = {} # (note, octave) -> sid
self.arp_after_id = 0
showwarning("garbled sound output", "When using miniaudio 1.20+, the audio could be garbled (not always the case). I haven't had time yet to debug and fix this. Sorry for any inconvenience.")
def bind_keypress(self, key, note, octave):
def kbpress(event):
self.pressed_keyboard(note, octave, False)
def kbrelease(event):
self.pressed_keyboard(note, octave, True)
self.master.bind(key, kbpress)
if key == '[':
key = "bracketleft"
if key == ']':
key = "bracketright"
self.master.bind("<KeyRelease-%s>" % key, kbrelease)
def create_synth(self):
samplerate = self.samplerate_choice.get()
self.synth = WaveSynth(samplewidth=2, samplerate=samplerate)
if self.output is not None:
self.output.close()
self.output = Output(self.synth.samplerate, self.synth.samplewidth, 1, mixing="mix")
def add_osc_to_gui(self):
osc_nr = len(self.oscillators)
fm_sources = ["osc "+str(n+1) for n in range(osc_nr)]
osc_pane = OscillatorGUI(self.osc_frame, self, "Oscillator "+str(osc_nr+1), fm_sources=fm_sources, pwm_sources=fm_sources)
osc_pane.pack(side=tk.LEFT, anchor=tk.N, padx=10, pady=10)
self.oscillators.append(osc_pane)
self.to_speaker_lb.insert(tk.END, "osc "+str(osc_nr+1))
def create_osc(self, note, octave, freq, from_gui, all_oscillators, is_audio=False):
def create_unfiltered_osc():
def create_chord_osc(clazz, **arguments):
if is_audio and self.arp_filter_gui.input_mode.get().startswith("chords"):
chord_keys = major_chord_keys(note, octave)
if self.arp_filter_gui.input_mode.get() == "chords3":
chord_keys = list(chord_keys)[:-1]
a4freq = self.a4_choice.get()
chord_freqs = [note_freq(n, o, a4freq) for n, o in chord_keys]
self.statusbar["text"] = "major chord: "+" ".join(n for n, o in chord_keys)
oscillators = []
arguments["amplitude"] /= len(chord_freqs)
for f in chord_freqs:
arguments["frequency"] = f
oscillators.append(clazz(**arguments))
return MixingFilter(*oscillators)
else:
# no chord (or an LFO instead of audio output oscillator), return one osc for only the given frequency
return clazz(**arguments)
waveform = from_gui.input_waveformtype.get()
amp = from_gui.input_amp.get()
bias = from_gui.input_bias.get()
if waveform == "noise":
return WhiteNoise(freq, amplitude=amp, bias=bias, samplerate=self.synth.samplerate)
elif waveform == "linear":
startlevel = from_gui.input_lin_start.get()
increment = from_gui.input_lin_increment.get()
minvalue = from_gui.input_lin_min.get()
maxvalue = from_gui.input_lin_max.get()
return Linear(startlevel, increment, minvalue, maxvalue)
else:
phase = from_gui.input_phase.get()
pw = from_gui.input_pw.get()
fm_choice = from_gui.input_fm.get()
pwm_choice = from_gui.input_pwm.get()
if fm_choice in (None, "", "<none>"):
fm = None
elif fm_choice.startswith("osc"):
osc_num = int(fm_choice.split()[1])
osc = all_oscillators[osc_num - 1]
fm = self.create_osc(note, octave, osc.input_freq.get(), all_oscillators[osc_num-1], all_oscillators)
else:
raise ValueError("invalid fm choice")
if pwm_choice in (None, "", "<none>"):
pwm = None
elif pwm_choice.startswith("osc"):
osc_num = int(pwm_choice.split()[1])
osc = all_oscillators[osc_num-1]
pwm = self.create_osc(note, octave, osc.input_freq.get(), osc, all_oscillators)
else:
raise ValueError("invalid fm choice")
if waveform == "pulse":
return create_chord_osc(Pulse, frequency=freq, amplitude=amp, phase=phase,
bias=bias, pulsewidth=pw, fm_lfo=fm, pwm_lfo=pwm,
samplerate=self.synth.samplerate)
elif waveform == "harmonics":
harmonics = self.parse_harmonics(from_gui.harmonics_text.get(1.0, tk.END))
return create_chord_osc(Harmonics, frequency=freq, harmonics=harmonics,
amplitude=amp, phase=phase, bias=bias, fm_lfo=fm,
samplerate=self.synth.samplerate)
else:
o = {
"sine": Sine,
"triangle": Triangle,
"sawtooth": Sawtooth,
"sawtooth_h": SawtoothH,
"square": Square,
"square_h": SquareH,
"semicircle": Semicircle,
"pointy": Pointy,
}[waveform]
return create_chord_osc(o, frequency=freq, amplitude=amp, phase=phase,
bias=bias, fm_lfo=fm, samplerate=self.synth.samplerate)
def envelope(osc, envelope_gui):
adsr_src = envelope_gui.input_source.get()
if adsr_src not in (None, "", "<none>"):
osc_num = int(adsr_src.split()[1])
if from_gui is self.oscillators[osc_num-1]:
return envelope_gui.filter(osc)
return osc
osc = create_unfiltered_osc()
for ev in self.envelope_filter_guis:
osc = envelope(osc, ev)
return osc
def parse_harmonics(self, harmonics):
parsed = []
for harmonic in harmonics.split():
num, frac = harmonic.split(",")
num = int(num)
if '/' in frac:
numerator, denominator = frac.split("/")
else:
numerator, denominator = frac, 1
frac = float(numerator)/float(denominator)
parsed.append((num, frac))
return parsed
def do_play(self, osc):
if osc.input_waveformtype.get() == "linear":
self.statusbar["text"] = "cannot output linear osc to speakers"
return
duration = 1.0
osc.set_title_status("TO SPEAKER")
self.update()
osc.after(int(duration*1000), lambda: osc.set_title_status(None))
o = self.create_osc(None, None, osc.input_freq.get(), osc, all_oscillators=self.oscillators, is_audio=True)
o = self.apply_filters(o)
sample = self.generate_sample(o, duration)
if sample.samplewidth != self.synth.samplewidth:
print("16 bit overflow!") # XXX
sample = sample.make_16bit()
self.output.play_sample(sample)
self.after(1000, lambda: osc.set_title_status(""))
def do_close_waveform(self):
for child in self.waveform_area.winfo_children():
child.destroy()
def do_plot(self, osc):
if not matplotlib:
self.statusbar["text"] = "Cannot plot! To plot things, you need to have matplotlib installed!"
return
o = self.create_osc(None, None, osc.input_freq.get(), osc, all_oscillators=self.oscillators).blocks()
blocks = list(itertools.islice(o, self.synth.samplerate//params.norm_osc_blocksize))
# integrating matplotlib in tikinter, see http://matplotlib.org/examples/user_interfaces/embedding_in_tk2.html
fig = Figure(figsize=(8, 2), dpi=100)
axis = fig.add_subplot(111)
axis.plot(sum(blocks, []))
axis.set_title("Waveform")
self.do_close_waveform()
canvas = FigureCanvasTkAgg(fig, master=self.waveform_area)
canvas.get_tk_widget().pack(side=tk.LEFT, fill=tk.BOTH, expand=1)
canvas.draw()
close_waveform = tk.Button(self.waveform_area, text="Close waveform", command=self.do_close_waveform)
close_waveform.pack(side=tk.RIGHT)
def generate_sample(self, oscillator: Oscillator, duration: float, use_fade: bool = False) -> Optional[Sample]:
scale = 2**(8*self.synth.samplewidth-1)
blocks = oscillator.blocks()
try:
sample_blocks = list(next(blocks) for _ in range(int(self.synth.samplerate*duration/params.norm_osc_blocksize)))
float_frames = sum(sample_blocks, [])
frames = [int(v*scale) for v in float_frames]
except StopIteration:
return None
else:
sample = Sample.from_array(frames, self.synth.samplerate, 1)
if use_fade:
sample.fadein(0.05).fadeout(0.1)
return sample
def render_and_play_note(self, oscillator: Oscillator, max_duration: float = 4) -> None:
duration = 0
for ev in self.envelope_filter_guis:
duration = max(duration, ev.duration)
if duration == 0:
duration = 1
duration = min(duration, max_duration)
sample = self.generate_sample(oscillator, duration)
if sample:
sample.fadein(0.05).fadeout(0.05)
if sample.samplewidth != self.synth.samplewidth:
print("16 bit overflow!") # XXX
sample.make_16bit()
self.output.play_sample(sample)
keypresses = collections.defaultdict(float) # (note, octave) -> timestamp
keyrelease_counts = collections.defaultdict(int) # (note, octave) -> int
def _key_release(self, note, octave):
# mechanism to filter out key repeats
self.keyrelease_counts[(note, octave)] -= 1
if self.keyrelease_counts[(note, octave)] <= 0:
self.pressed(note, octave, True)
def pressed_keyboard(self, note, octave, released=False):
if released:
self.keyrelease_counts[(note, octave)] += 1
self.after(400, lambda n=note, o=octave: self._key_release(n, o))
else:
time_since_previous = time.time() - self.keypresses[(note, octave)]
self.keypresses[(note, octave)] = time.time()
if time_since_previous < 0.8:
# assume auto-repeat, and do nothing
return
self.pressed(note, octave)
def pressed(self, note, octave, released=False):
if self.arp_filter_gui.input_mode.get().startswith("arp"):
if released:
if self.arp_after_id:
self.after_cancel(self.arp_after_id) # stop the arp cycle
self.statusbar["text"] = "ok"
self.arp_after_id = 0
return
chord_keys = major_chord_keys(note, octave)
if self.arp_filter_gui.input_mode.get() == "arpeggio3":
chord_keys = list(chord_keys)[:-1]
self.statusbar["text"] = "arpeggio: "+" ".join(note for note, octave in chord_keys)
self.play_note(chord_keys)
else:
self.statusbar["text"] = "ok"
self.play_note([(note, octave)], released)
def play_note(self, list_of_notes, released=False):
# list of notes to play (length 1 = just one note, more elements = arpeggiator list)
to_speaker = [self.oscillators[i] for i in self.to_speaker_lb.curselection()]
if not to_speaker:
self.statusbar["text"] = "No oscillators connected to speaker output!"
return
if released:
for note, octave in list_of_notes:
if (note, octave) in self.currently_playing:
# stop the note
sid = self.currently_playing[(note, octave)]
self.output.stop_sample(sid)
return
first_note, first_octave = list_of_notes[0]
first_freq = note_freq(first_note, first_octave, self.a4_choice.get())
for osc in self.oscillators:
if osc.input_freq_keys.get():
osc.input_freq.set(first_freq*osc.input_freq_keys_ratio.get())
for osc in to_speaker:
if osc.input_waveformtype.get() == "linear":
self.statusbar["text"] = "cannot output linear osc to speakers"
return
else:
osc.set_title_status("TO SPEAKER")
oscs_to_play = []
for note, octave in list_of_notes:
freq = note_freq(note, octave, self.a4_choice.get())
oscs = [self.create_osc(note, octave, freq * osc.input_freq_keys_ratio.get(), osc,
self.oscillators, is_audio=True) for osc in to_speaker]
mixed_osc = MixingFilter(*oscs) if len(oscs) > 1 else oscs[0]
self.echos_ending_time = 0
if len(list_of_notes) <= 1:
# you can't use filters and echo when using arpeggio for now
mixed_osc = self.apply_filters(mixed_osc)
current_echos_duration = getattr(mixed_osc, "echo_duration", 0)
if current_echos_duration > 0:
self.echos_ending_time = time.time() + current_echos_duration
oscs_to_play.append(mixed_osc)
if len(list_of_notes) > 1:
rate = self.arp_filter_gui.input_rate.get()
duration = rate * self.arp_filter_gui.input_ratio.get() / 100.0
self.statusbar["text"] = "playing ARP ({0}) from note {1} {2}".format(len(oscs_to_play), first_note, first_octave)
for index, (note, octave) in enumerate(list_of_notes):
sample = StreamingOscSample(oscs_to_play[index], self.synth.samplerate, duration)
sid = self.output.play_sample(sample, delay=rate*index)
self.currently_playing[(note, octave)] = sid
self.arp_after_id = self.after(int(rate * len(list_of_notes) * 1000), lambda: self.play_note(list_of_notes)) # repeat arp!
else:
# normal, single note
if self.rendering_choice.get() == "render":
self.statusbar["text"] = "rendering note sample..."
self.after_idle(lambda: self.render_and_play_note(mixed_osc))
else:
self.statusbar["text"] = "playing note {0} {1}".format(first_note, first_octave)
sample = StreamingOscSample(oscs_to_play[0], self.synth.samplerate)
sid = self.output.play_sample(sample)
self.currently_playing[(first_note, first_octave)] = sid
def reset_osc_title_status():
for osc in to_speaker:
osc.set_title_status("")
self.after(1000, reset_osc_title_status)
def apply_filters(self, output_oscillator):
output_oscillator = self.tremolo_filter_gui.filter(output_oscillator)
output_oscillator = self.echo_filter_gui.filter(output_oscillator)
return output_oscillator
def load_preset(self):
file = askopenfile(filetypes=[("Synth presets", "*.ini")])
cf = ConfigParser()
cf.read_file(file)
file.close()
# general settings
self.samplerate_choice.set(cf["settings"]["samplerate"])
self.rendering_choice.set(cf["settings"]["rendering"])
self.a4_choice.set(cf["settings"]["a4tuning"])
self.to_speaker_lb.selection_clear(0, tk.END)
to_speaker = cf["settings"]["to_speaker"]
to_speaker = tuple(to_speaker.split(','))
for o in to_speaker:
self.to_speaker_lb.selection_set(int(o)-1)
for section in cf.sections():
if section.startswith("oscillator"):
num = int(section.split('_')[1])-1
osc = self.oscillators[num]
for name, value in cf[section].items():
getattr(osc, name).set(value)
osc.waveform_selected()
elif section.startswith("envelope"):
num = int(section.split('_')[1])-1
env = self.envelope_filter_guis[num]
for name, value in cf[section].items():
getattr(env, name).set(value)
elif section == "arpeggio":
for name, value in cf[section].items():
getattr(self.arp_filter_gui, name).set(value)
elif section == "tremolo":
for name, value in cf[section].items():
getattr(self.tremolo_filter_gui, name).set(value)
elif section == "echo":
for name, value in cf[section].items():
getattr(self.echo_filter_gui, name).set(value)
self.statusbar["text"] = "preset loaded."
def save_preset(self):
file = asksaveasfile(filetypes=[("Synth presets", "*.ini")])
cf = ConfigParser(dict_type=collections.OrderedDict)
# general settings
cf.add_section("settings")
cf["settings"]["samplerate"] = str(self.samplerate_choice.get())
cf["settings"]["rendering"] = self.rendering_choice.get()
cf["settings"]["to_speaker"] = ",".join(str(v+1) for v in self.to_speaker_lb.curselection())
cf["settings"]["a4tuning"] = str(self.a4_choice.get())
# oscillators
for num, osc in enumerate(self.oscillators, 1):
section = "oscillator_"+str(num)
cf.add_section(section)
for name, var in vars(osc).items():
if name.startswith("input_"):
cf[section][name] = str(var.get())
# adsr envelopes
for num, flter in enumerate(self.envelope_filter_guis, 1):
section = "envelope_"+str(num)
cf.add_section(section)
for name, var in vars(flter).items():
if name.startswith("input_"):
cf[section][name] = str(var.get())
# echo
cf.add_section("echo")
for name, var in vars(self.echo_filter_gui).items():
if name.startswith("input_"):
cf["echo"][name] = str(var.get())
# tremolo
cf.add_section("tremolo")
for name, var in vars(self.tremolo_filter_gui).items():
if name.startswith("input_"):
cf["tremolo"][name] = str(var.get())
# arpeggio
cf.add_section("arpeggio")
for name, var in vars(self.arp_filter_gui).items():
if name.startswith("input_"):
cf["arpeggio"][name] = str(var.get())
cf.write(file)
file.close()
class Player:
update_rate = 50 # 50 ms = 20 updates/sec
levelmeter_lowest = -40 # dB
xfade_duration = 7
def __init__(self, app, trackframes):
self.app = app
self.trackframes = trackframes
self.app.after(self.update_rate, self.tick)
self.stopping = False
self.mixer = StreamMixer([], endless=True)
self.output = Output(self.mixer.samplerate, self.mixer.samplewidth, self.mixer.nchannels, mixing="sequential", queue_size=2)
self.mixed_samples = iter(self.mixer)
self.levelmeter = LevelMeter(rms_mode=False, lowest=self.levelmeter_lowest)
self.output.register_notify_played(self.levelmeter.update)
for tf in self.trackframes:
tf.player = self
player_thread = Thread(target=self._play_sample_in_thread, name="jukebox_sampleplayer")
player_thread.daemon = True
player_thread.start()
def skip(self, trackframe):
if trackframe.state != TrackFrame.state_needtrack and trackframe.stream:
trackframe.stream.close()
trackframe.stream = None
trackframe.display_track(None, None, None, "(next track...)")
trackframe.state = TrackFrame.state_switching
def stop(self):
self.stopping = True
for tf in self.trackframes:
if tf.stream:
tf.stream.close()
tf.stream = None
tf.state = TrackFrame.state_needtrack
self.mixer.close()
self.output.close()
def tick(self):
# the actual decoding and sound playing is done in a background thread
self._levelmeter()
self._load_song()
self._play_song()
self._crossfade()
if not self.stopping:
self.app.after(self.update_rate, self.tick)
def _play_sample_in_thread(self):
"""
This is run in a background thread to avoid GUI interactions interfering with audio output.
"""
while True:
if self.stopping:
break
_, sample = next(self.mixed_samples)
if sample and sample.duration > 0:
self.output.play_sample(sample)
else:
self.levelmeter.reset()
time.sleep(self.update_rate/1000*2) # avoid hogging the cpu while no samples are played
def _levelmeter(self):
self.app.update_levels(self.levelmeter.level_left, self.levelmeter.level_right)
def _load_song(self):
if self.stopping:
return # make sure we don't load new songs when the player is shutting down
for tf in self.trackframes:
if tf.state == TrackFrame.state_needtrack:
track = self.app.pop_playlist_track()
if track:
tf.track = track
tf.state = TrackFrame.state_idle
def _play_song(self):
def start_stream(tf, filename, volume):
def _start_from_thread():
# start loading the track from a thread to avoid gui stutters when loading takes a bit of time
tf.stream = AudiofileToWavStream(filename, hqresample=hqresample)
self.mixer.add_stream(tf.stream, [tf.volumefilter])
tf.playback_started = datetime.datetime.now()
tf.state = TrackFrame.state_playing
tf.volume = volume
tf.state = TrackFrame.state_loading
Thread(target=_start_from_thread, name="stream_loader").start()
for tf in self.trackframes:
if tf.state == TrackFrame.state_playing:
remaining = tf.track_duration - (datetime.datetime.now() - tf.playback_started)
remaining = remaining.total_seconds()
tf.time = datetime.timedelta(seconds=math.ceil(remaining))
if tf.stream.closed and tf.time.total_seconds() <= 0:
self.skip(tf) # stream ended!
elif tf.state == TrackFrame.state_idle:
if tf.xfade_state == TrackFrame.state_xfade_fadingin:
# if we're set to fading in, regardless of other tracks, we start playing as well
start_stream(tf, tf.track["location"], 0)
elif not any(tf for tf in self.trackframes if tf.state in (TrackFrame.state_playing, TrackFrame.state_loading)):
# if there is no other track currently playing (or loading), it's our turn!
start_stream(tf, tf.track["location"], 100)
elif tf.state == TrackFrame.state_switching:
tf.state = TrackFrame.state_needtrack
def _crossfade(self):
for tf in self.trackframes:
# nearing the end of the track? then start a fade out
if tf.state == TrackFrame.state_playing \
and tf.xfade_state == TrackFrame.state_xfade_nofade \
and tf.time.total_seconds() <= self.xfade_duration:
tf.xfade_state = TrackFrame.state_xfade_fadingout
tf.xfade_started = datetime.datetime.now()
tf.xfade_start_volume = tf.volume
# fade in the first other track that is currently idle
for other_tf in self.trackframes:
if tf is not other_tf and other_tf.state == TrackFrame.state_idle:
other_tf.xfade_state = TrackFrame.state_xfade_fadingin
other_tf.xfade_started = datetime.datetime.now()
other_tf.xfade_start_volume = 0
other_tf.volume = 0
break
for tf in self.trackframes:
if tf.xfade_state == TrackFrame.state_xfade_fadingin:
# fading in, slide volume up from 0 to 100%
volume = 100 * (datetime.datetime.now() - tf.xfade_started).total_seconds() / self.xfade_duration
tf.volume = min(volume, 100)
if volume >= 100:
tf.xfade_state = TrackFrame.state_xfade_nofade # fade reached the end
elif tf.xfade_state == TrackFrame.state_xfade_fadingout:
# fading out, slide volume down from what it was at to 0%
fade_progress = (datetime.datetime.now() - tf.xfade_started)
fade_progress = (self.xfade_duration - fade_progress.total_seconds()) / self.xfade_duration
volume = max(0, tf.xfade_start_volume * fade_progress)
tf.volume = max(volume, 0)
if volume <= 0:
tf.xfade_state = TrackFrame.state_xfade_nofade # fade reached the end
def play_sample(self, sample):
def unmute(trf, vol):
if trf:
trf.volume = vol
if sample and sample.duration > 0:
for tf in self.trackframes:
if tf.state == TrackFrame.state_playing:
old_volume = tf.mute_volume(40)
self.mixer.add_sample(sample, lambda mtf=tf, vol=old_volume: unmute(mtf, vol))
break
else:
self.mixer.add_sample(sample)
class Repl(cmd.Cmd):
"""
Interactive command line interface to load/record/save and play samples, patterns and whole tracks.
Currently it has no way of defining and loading samples manually. This means you need to initialize
it with a track file containing at least the instruments (samples) that you will be using.
"""
def __init__(self, discard_unused_instruments=False):
self.song = Song()
self.discard_unused_instruments = discard_unused_instruments
self.out = Output(mixing="sequential", queue_size=1)
super(Repl, self).__init__()
def do_quit(self, args):
"""quits the session"""
print("Bye.", args)
self.out.close()
return True
def do_bpm(self, bpm):
"""set the playback BPM (such as 174 for some drum'n'bass)"""
try:
self.song.bpm = int(bpm)
except ValueError as x:
print("ERROR:", x)
def do_ticks(self, ticks):
"""set the number of pattern ticks per beat (usually 4 or 8)"""
try:
self.song.ticks = int(ticks)
except ValueError as x:
print("ERROR:", x)
def do_samples(self, args):
"""show the loaded samples"""
print("Samples:")
print(", ".join(self.song.instruments))
def do_patterns(self, args):
"""show the loaded patterns"""
print("Patterns:")
for name, pattern in sorted(self.song.patterns.items()):
self.print_pattern(name, pattern)
def print_pattern(self, name, pattern):
print("PATTERN {:s}".format(name))
for instrument, bars in pattern.items():
print(" {:>15s} = {:s}".format(instrument, bars))
def do_pattern(self, names):
"""play the pattern with the given name(s)"""
names = names.split()
for name in sorted(set(names)):
try:
pat = self.song.patterns[name]
self.print_pattern(name, pat)
except KeyError:
print("no such pattern '{:s}'".format(name))
return
patterns = [self.song.patterns[name] for name in names]
try:
m = Mixer(patterns, self.song.bpm, self.song.ticks,
self.song.instruments)
result = m.mix(verbose=len(patterns) > 1).make_16bit()
self.out.play_sample(result)
self.out.wait_all_played()
except ValueError as x:
print("ERROR:", x)
def do_play(self, args):
"""play a single sample by giving its name, add a bar (xx..x.. etc) to play it in a bar"""
if ' ' in args:
instrument, pattern = args.split(maxsplit=1)
pattern = pattern.replace(' ', '')
else:
instrument = args
pattern = None
instrument = instrument.strip()
try:
sample = self.song.instruments[instrument]
except KeyError:
print("unknown sample")
return
if pattern:
self.play_single_bar(sample, pattern)
else:
sample = sample.copy().make_16bit()
self.out.play_sample(sample)
self.out.wait_all_played()
def play_single_bar(self, sample, pattern):
try:
m = Mixer([{
"sample": pattern
}], self.song.bpm, self.song.ticks, {"sample": sample})
result = m.mix(verbose=False).make_16bit()
self.out.play_sample(result)
self.out.wait_all_played()
except ValueError as x:
print("ERROR:", x)
def do_mix(self, args):
"""mix and play all patterns of the song"""
if not self.song.pattern_sequence:
print("Nothing to be mixed.")
return
output = "__temp_mix.wav"
self.song.mix(output)
mix = Sample(wave_file=output)
print("Playing sound...")
self.out.play_sample(mix)
os.remove(output)
def do_stream(self, args):
"""
mix all patterns of the song and stream the output to your speakers in real-time,
or to an output file if you give a filename argument.
This is the fastest and most efficient way of generating the output mix because
it uses very little memory and avoids large buffer copying.
"""
if not self.song.pattern_sequence:
print("Nothing to be mixed.")
return
if args:
filename = args.strip()
print("Mixing and streaming to output file '{0}'...".format(
filename))
self.out.stream_to_file(filename, self.song.mix_generator())
print("\r ")
return
print("Mixing and streaming to speakers...")
try:
samples = self.out.normalized_samples(self.song.mix_generator())
for sample in samples:
self.out.play_sample(sample)
print("\r ")
self.out.wait_all_played()
except KeyboardInterrupt:
print("Stopped.")
def do_rec(self, args):
"""Record (or overwrite) a new sample (instrument) bar in a pattern.
Args: [pattern name] [sample] [bar(s)].
Omit bars to remote the sample from the pattern.
If a pattern with the name doesn't exist yet it will be added."""
args = args.split(maxsplit=2)
if len(args) not in (2, 3):
print("Wrong arguments. Use: patternname sample bar(s)")
return
if len(args) == 2:
args.append(None) # no bars
pattern_name, instrument, bars = args
if instrument not in self.song.instruments:
print("Unknown sample '{:s}'.".format(instrument))
return
if pattern_name not in self.song.patterns:
self.song.patterns[pattern_name] = {}
pattern = self.song.patterns[pattern_name]
if bars:
bars = bars.replace(' ', '')
if len(bars) % self.song.ticks != 0:
print("Bar length must be multiple of the number of ticks.")
return
pattern[instrument] = bars
else:
if instrument in pattern:
del pattern[instrument]
if pattern_name in self.song.patterns:
if not self.song.patterns[pattern_name]:
del self.song.patterns[pattern_name]
print("Pattern was empty and has been removed.")
else:
self.print_pattern(pattern_name,
self.song.patterns[pattern_name])
def do_seq(self, names):
"""
Print the sequence of patterns that form the current track,
or if you give a list of names: use that as the new pattern sequence.
"""
if not names:
print(" ".join(self.song.pattern_sequence))
return
names = names.split()
for name in names:
if name not in self.song.patterns:
print("Unknown pattern '{:s}'.".format(name))
return
self.song.pattern_sequence = names
def do_load(self, filename):
"""Load a new song file"""
song = Song()
try:
song.read(filename, self.discard_unused_instruments)
self.song = song
except IOError as x:
print("ERROR:", x)
def do_save(self, filename):
"""Save current song to file"""
if not filename:
print("Give filename to save song to.")
return
if not filename.endswith(".ini"):
filename += ".ini"
if os.path.exists(filename):
if input("File exists: '{:s}'. Overwrite y/n? ".format(
filename)) not in ('y', 'yes'):
return
self.song.write(filename)
class LevelGUI(tk.Frame):
def __init__(self, audio_source, master=None):
self.lowest_level = -50
super().__init__(master)
self.master.title("Levels")
self.pbvar_left = tk.IntVar()
self.pbvar_right = tk.IntVar()
pbstyle = ttk.Style()
pbstyle.theme_use("classic")
pbstyle.configure("green.Vertical.TProgressbar", troughcolor="gray", background="light green")
pbstyle.configure("yellow.Vertical.TProgressbar", troughcolor="gray", background="yellow")
pbstyle.configure("red.Vertical.TProgressbar", troughcolor="gray", background="orange")
frame = tk.LabelFrame(self, text="Left")
frame.pack(side=tk.LEFT)
tk.Label(frame, text="dB").pack()
self.pb_left = ttk.Progressbar(frame, orient=tk.VERTICAL, length=300,
maximum=-self.lowest_level, variable=self.pbvar_left,
mode='determinate', style='yellow.Vertical.TProgressbar')
self.pb_left.pack()
frame = tk.LabelFrame(self, text="Right")
frame.pack(side=tk.LEFT)
tk.Label(frame, text="dB").pack()
self.pb_right = ttk.Progressbar(frame, orient=tk.VERTICAL, length=300,
maximum=-self.lowest_level, variable=self.pbvar_right,
mode='determinate', style='yellow.Vertical.TProgressbar')
self.pb_right.pack()
frame = tk.LabelFrame(self, text="Info")
self.info = tk.Label(frame, text="", justify=tk.LEFT)
frame.pack()
self.info.pack(side=tk.TOP)
self.pack()
self.open_audio_file(audio_source)
self.after_idle(self.update)
self.after_idle(self.stream_audio)
def open_audio_file(self, filename_or_stream):
wav = wave.open(filename_or_stream, 'r')
self.samplewidth = wav.getsampwidth()
self.samplerate = wav.getframerate()
self.nchannels = wav.getnchannels()
self.samplestream = iter(SampleStream(wav, self.samplerate // 10))
self.levelmeter = LevelMeter(rms_mode=False, lowest=self.lowest_level)
self.audio_out = Output(self.samplerate, self.samplewidth, self.nchannels, mixing="sequential", queue_size=3)
print("Audio API used:", self.audio_out.audio_api)
if not self.audio_out.supports_streaming:
raise RuntimeError("need api that supports streaming")
self.audio_out.register_notify_played(self.levelmeter.update)
filename = filename_or_stream if isinstance(filename_or_stream, str) else "<stream>"
info = "Source:\n{}\n\nRate: {:g} Khz\nBits: {}\nChannels: {}"\
.format(filename, self.samplerate/1000, 8*self.samplewidth, self.nchannels)
self.info.configure(text=info)
def stream_audio(self):
try:
sample = next(self.samplestream)
self.audio_out.play_sample(sample)
self.after(20, self.stream_audio)
except StopIteration:
self.audio_out.close()
def update(self):
if not self.audio_out.still_playing():
self.pbvar_left.set(0)
self.pbvar_right.set(0)
print("done!")
return
left, peak_l = self.levelmeter.level_left, self.levelmeter.peak_left
right, peak_r = self.levelmeter.level_right, self.levelmeter.peak_right
self.pbvar_left.set(left-self.lowest_level)
self.pbvar_right.set(right-self.lowest_level)
if left > -3:
self.pb_left.configure(style="red.Vertical.TProgressbar")
elif left > -6:
self.pb_left.configure(style="yellow.Vertical.TProgressbar")
else:
self.pb_left.configure(style="green.Vertical.TProgressbar")
if right > -3:
self.pb_right.configure(style="red.Vertical.TProgressbar")
elif right > -6:
self.pb_right.configure(style="yellow.Vertical.TProgressbar")
else:
self.pb_right.configure(style="green.Vertical.TProgressbar")
self.after(1000//update_rate, self.update)
