ALSA lib pcm.c:8306:(snd_pcm_recover) underrun occurred

[jorgelscati]

Sometimes, I am getting this error when some wav files are playing.

I have an application that plays a wav file in loop. This app is querying if wav is playing every time. If it is not playing, it plays again.

The error occurred when wav file is play again.

This is the simplified code:

import time
import simpleaudio

WAV = "02_off.wav"

def play():
    last_wave_object = simpleaudio.WaveObject.from_wave_file(WAV)
    last_play_object = last_wave_object.play()
    alive = True
    while alive:
        try:
            if last_play_object.is_playing():
                print("Already it's playing")
            else:
                print("Wav reaches end. Starting again")
                last_play_object = last_wave_object.play()
        except KeyboardInterrupt:
            alive = False
        finally:
            time.sleep(0.25)

if __name__ == "__main__":
    play()

And, I attach the wav file.
02_off.zip

The output will be some like:

Already it's playing
Already it's playing
Already it's playing
Already it's playing
Already it's playing
Already it's playing
Already it's playing
Already it's playing
Already it's playing
Already it's playing
Already it's playing
Already it's playing
Already it's playing
Wav reaches end. Starting again
Already it's playing
Already it's playing
Already it's playing
Already it's playing
Already it's playing
Already it's playing
Already it's playing
Already it's playing
Already it's playing
Already it's playing
Already it's playing
Already it's playing
Wav reaches end. Starting again
ALSA lib pcm.c:8306:(snd_pcm_recover) underrun occurred
Already it's playing
Already it's playing
Already it's playing
Already it's playing

[jorgelscati]

Sorry.

I test on:

• Ubuntu 18.04
• simpleaudio 1.0.4
• python 3.6.9

[jorgelscati]

The error depends wav file played. With other wav files, it does not happen.

[jorgelscati]

I have tried to stop audio before playing again. And also, make a new "wav_object".

The "else" code is changed to:

else:
    simpleaudio.stop_all()
    time.sleep(1)
    print("Wav reaches end. Starting again")
    last_wave_object = simpleaudio.WaveObject.from_wave_file(WAV)
    last_play_object = last_wave_object.play()

Maybe, it is needed more time to error happens, but error occurred too.