start_tone / stop_tone implemented. #4
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tannewt
requested changes
Oct 2, 2017
| shift = 2 ** 15 | ||
| for i in range(length): | ||
| yield int(TONE_VOLUME * math.sin(2*math.pi*(i / length)) + shift) | ||
|
|
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def _generate_sample(self):
if self.sample != None:
return
length = 100
sine_wave = array.array("H", sine_sample(length))
self.sample = audioio.AudioOut(board.SPEAKER, sine_wave)
| for i in range(length): | ||
| sine_wave[i] = int(math.sin(math.pi * 2 * i / 18) * (2 ** 15) + 2 ** 15) | ||
|
|
||
| sample = audioio.AudioOut(board.SPEAKER, sine_wave) | ||
|
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| circuit.start_tone(294) | ||
| else: | ||
| circuit.stop_tone() | ||
| """ |
| # Play a tone of the specified frequency (hz). | ||
| self.sample.frequency = int(len(self.sine_wave) * frequency) | ||
| if not self.sample.playing: | ||
| self.sample.play(loop=True) |
tannewt
approved these changes
Oct 3, 2017
| # Play a tone of the specified frequency (hz). | ||
| self.start_tone(frequency) | ||
| time.sleep(duration) | ||
| self.stop_tone() |
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