0

I'm trying to use my Raspberry Pi as a white noise generator using SOX and my bluetooth speaker (BOSE mini soundlink II). Everything works great at first, however after a certain period of time (as early as 20 min, as long as 6 hours) the sound stops and I get this error on the command line:

ALSA lib bluealsa-pcm.c:200:(io_thread) PCM FIFO write error: Broken pipe play WARN alsa: under-run play FAIL sox: `default' No such device: Operation not permitted

After this error I am unable to play any audio (the little speaker icon in the task bar is grey with a red line through it). The only way I have been able to fix it is to reboot the Pi. After reboot everything works great again until the audio plays for a while (the time varies) and then the same error occurs and I need to reboot again.

I would like to play the white noise overnight while sleeping (ideally indefinitely) however I usually only get about 30 - 60 min before the error occurs. I can play white noise using an app on my phone with the same bluetooth speaker and this works fine (indefinitely). I have tried physically plugging in the speaker using the aux cable connection and the same error occurs. I am using raspbian stretch with desktop (Pi model 3 B). I have also tried several fresh raspbian installs, also on raspbian stretch lite (this is the one that lasted for 6 hours... but still gave an error eventually). The same error happens when I play any audio file/collection of audio files after a similar period of time (20 - 30 min on average).

I am very much an amateur so perhaps I am missing something obvious but I cannot seem to find any solution to this problem anywhere online and nothing I have tried works. I am using SOX because it is a very useful way of playing white noise from the Pi - I would just like it to play indefinitely without error.

Any ideas on what the problem might be? Thank you!

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.