62a694dbe985bb9e9007d6bf4cb21d6776a985ef,examples/advanced/spectrum.py,,get_audio_data,#,92

Before Change

    stream = pa.open(format=pyaudio.paInt16, channels=1, rate=SAMPLING_RATE,
                     input=True, frames_per_buffer=NUM_SAMPLES)
    audio_data  = fromstring(stream.read(NUM_SAMPLES), dtype=short)
    stream.close()
    normalized_data = audio_data / 32768.0
    return (abs(fft(normalized_data))[:NUM_SAMPLES/2], normalized_data)

After Change

_stream = None
def get_audio_data():
    global _stream
    if _stream is None:
        pa = pyaudio.PyAudio()
        _stream = pa.open(format=pyaudio.paInt16, channels=1, rate=SAMPLING_RATE,
                     input=True, frames_per_buffer=NUM_SAMPLES)
    audio_data  = fromstring(_stream.read(NUM_SAMPLES), dtype=short)
    normalized_data = audio_data / 32768.0
    return (abs(fft(normalized_data))[:NUM_SAMPLES/2], normalized_data)

Instances