The "alsa xrun recovery apparently failed" bug seems to be solved here : https://github.com/pure-data/pure-data/issues/969

So, I downloaded the latest source code and installed Pd 0.51-4 on my Raspi (with Buster ->Linux version 5.4.72-v7+ (dom@buildbot) (gcc version 9.3.0 (Ubuntu 9.3.0-17ubuntu1~20.04)) #1356 SMP Thu Oct 22 13:56:54 BST 2020)

I use the onboard soundcard (bcm2835), as far as there is no input, I uncheck "input device". When I tested sound, there was no "alsa xrun recovery apparently failed" error message.

But some minutes later in "Pd noGui or GUI mode" + "Raspi console or graphic mode", the error is still there.

@mswcpt said:

@marivier.rocks Hi - did you get this reproduced on a new SD? I have this problem even after trying your solution. Thanks

My solution wasn't the good one, sorry. See hereafter others tries...

Hello, I just solved this problem today, here is how :
1- install pure data via terminal (sudo apt-get install puredata)
-> pd0.49.0 came
2- launch Pd via console (puredata)
3- menu media/audio parameters
4- select in & out : bcm2835 Headphones (hardware)
===>>>> ususally I click "ok" and when I test audio Pd crashes <====
5- click "save all settings" or "enregistrer tous les réglages"
6- click "ok"

Pure Data stopped to crash when I tested audio.

I can NOT explain why.

I'm preparing a new SD card to reproduct this, and I'll keep you informed.