Does SoundDevice keeps recording while executing callback?

[yichengye310]

Hi,

I am currently using SoundDevice to record with a callback. I am trying to do real-time detection to the sound recording. My question is, does SoundDevice keeps recording while executing callback? Because the callback maybe takes some time if the blocksize is large. Thank you.

def callback(indata, frames, time, status):
    outdata = np.reshape(indata, (len(indata),))
    predict_x = extract_feature_soundclip(outdata)
    with graph.as_default():
        predictions = model_a2.predict(predict_x)
    if len(predictions) == 0:
        print("Model A Test No Prediction!")
        return
    predictions_mean_a = np.mean(predictions, axis=0)
    print(predictions_mean_a)

stream = sd.InputStream(channels=1, callback=callback, dtype='float32', blocksize=256000)
stream.start()

[mgeier]

Did you read the last 2 paragraphs in the documentation of the callback argument at https://python-sounddevice.readthedocs.io/en/0.4.1/api/streams.html#sounddevice.Stream?

You should always check the status argument, which will tell you if an over-/underflow happened.