def _post_process(self):
'''Effects added to the instrument. They can linger beyond notes.'''
if self._tremolo_freq > 0:
self._wave = effects.tremolo(self._wave, self._tremolo_freq)
if self._slow_intro:
attack = adsr.linear_envelope(0, 1, self._total_dur)
self._wave = mixer.multiply((self._wave, attack))
self._wave = effects.echo(self._timer, self._wave, .2, 1/4)
def _chord_to_wave(self, chord_notes):
'''Change lists of notes.Note() objects into numpy arrays of samples.'''
# ring modulation done seperately for each indiv. note
chord_waves = []
for note in chord_notes:
dur = self._timer.samples_per_note(note.dur)
self._total_dur += dur
if note is None or note.dur == 0:
continue
if note.note == notes.REST:
return oscil.Flat(dur=dur)
carrier = self._oscil(note.freq, self._vol, dur=dur)
if self._detune == 1:
modulated_tone = carrier
else:
modulator = self._oscil(note.freq/self._detune, self._vol,
dur=dur)
modulated_tone = mixer.multiply((carrier, modulator))
chord_waves.append(modulated_tone)
return mixer.add(chord_waves)
def _post_process(self):
if self._tremolo_freq > 0:
self._wave = effects.tremolo(self._wave, self._tremolo_freq)
if self._slow_intro:
attack = adsr.linear_envelope(0, 1, self._total_dur)
self._wave = mixer.multiply((self._wave, attack))
