Audio

README.md

@@ -1568,6 +1568,28 @@ wf.writeframes(b''.join(samples))
 wf.close()
 ```
 
+### Plays Popcorn
+```python
+# pip3 install simpleaudio
+import simpleaudio as sa
+from itertools import chain, repeat
+from math import pi, sin
+import struct
+F = 44100
+S1 = '59J,57j,,59J,54j,,50J,54j,,47J,,,'
+S2 = '59J,61j,,62J,61j,,62j,,59j,,61J,59j,,61j,,57j,,59J,57j,,59j,,55j,,59J,,,'
+sin_f     = lambda frame_no, hz: sin(frame_no * 2 * pi * hz / F)
+get_wave  = lambda hz, seconds: (sin_f(i, hz) for i in range(int(seconds * F)))
+get_pause = lambda seconds: repeat(0, int(seconds * F))
+get_hz    = lambda note: round(16.352 * 2 ** (int(note[:2])/12))
+parse_n   = lambda note: (get_hz(note), 0.25 if note[2] == 'J' else 0.125)
+get_note  = lambda note: get_wave(*parse_n(note)) if note else get_pause(0.125)
+notes_seq = f'{S1}{S1}{S2}{S1}{S1}{S2}'
+samples_f = chain.from_iterable(get_note(n) for n in notes_seq.split(','))
+samples_b = b''.join(struct.pack('<h', int(a * 30000)) for a in samples_f)
+sa.play_buffer(samples_b, 1, 2, F)
+```
+
 
 Url
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