[PD] alsa crashing on recent Pi OS

[Linux Rouen Normandie]

Hello Yann,

For testing them on my RPi 400 / RPi OS 11 32-bit / Pd 0.54.1, which Pd 
file(s) to download from your GIT site?

Then if more than one Pd file, which one for launching 'humanCall' and 
'soundDestroyer'?

----------

Le 01/12/2023 à 16:23, Linux ROUEN Normandie a écrit :
> Hello Yann,
>
> On my side I'm running an up-to-date RPi OS 11 32-bit Bullseye (Full 
> version) since ~ 2 years on an overclocked RPi 400 (RPi 4 @ 2.4 GHz 
> with an embedded keyboard + 4 GB RAM).
> I'm building Pd from its source currently latest v.0.54.1 ('apt-get 
> install puredata' gives you an old version of Pd), and my MIDI/Audio 
> patches are running smoothly with an external cheap USB Audio adapter.
> When I will have access to my RPi 400 I will run your patches and will 
> report.
>
> Screen capture done on Linux Mint 21.2 - Choose this RPi OS Full (or 
> Lite) for your tests:
>
>
> I haven't tested RPi OS 12 64-bit Bookworm (Full) yet on my RPi 400.
> Like you I have red there are a lot of changes and especially with the 
> Audio 
> <https://www.raspberrypi.com/news/bookworm-the-new-version-of-raspberry-pi-os/>.
>
> Best,
> Joseph Gastelais
> --------------------
>
> Le 01/12/2023 à 09:03, Yann Seznec a écrit :
>> Hi again,
>>
>> I’m wondering if anyone else is having the same issue as me. I’m 
>> trying to run Pd patches on Raspberry Pi, and I (perhaps naively) 
>> thought that I would use the latest Pi OS.
>>
>> I seem to be having far more issues than I had in the past, namely 
>> with alsa crashing. It seems like virtually any patch I run will 
>> sooner or later crash and print hundreds of lines of this error:
>> restartalsa output alsa xrun recovery apparently failed
>>
>> Someone on the Pd Forums 
>> <https://forum.pdpatchrepo.info/topic/14536/alsa-crashing-on-pi/7> suggested 
>> that this could be an issue with the latest Pi OS switching to 
>> PipeWire, which seems to make some sense. But before I attempt any 
>> fixes, I wanted to see if anyone else was running into this problem 
>> or might have some suggestions.
>>
>> Alternatively, can anyone suggest to me a version of the raspberry pi 
>> operating system that works well for Pd? Perhaps it will be easiest 
>> for me to track down an old OS image and just stick to that.
>>
>> Here are a few more details of what I’m trying, which is ending up 
>> with this issue:
>>
>> - Using both a Raspberry Pi 3 and 4
>> - Installing the latest Pi OS using the official Pi imager. I believe 
>> this was slightly different versions for the Pi 3 and Pi 4, but the 
>> end result was the same anyway.
>> - I am using the “lite” version so it’s all command line.
>> - installing Pd from the repo (apt-get install puredata). I am not 
>> certain what version this is…I think 0.50?
>> - Trying to run a small granular patch like this 
>> <https://github.com/yannseznec/humanCall> or a sampler/looper patch 
>> like this <https://github.com/yannseznec/soundDestroyer>
>> - I have tried running with a higher block size (up to 1024) thinking 
>> that maybe the patches were too intense. This didn’t seem to help.
>> - This is perhaps unrelated, but I did notice that I needed to 
>> specify the audio output in the command I’m using to launch the 
>> patch. I’m pretty certain this wasn’t necessary in patches I have run 
>> on a Pi before.
>>
>> I always get the errors described above. I recognise that this is 
>> somewhat anecdotal, but I am really certain that I was able to run 
>> much more complicated patches on a Pi several years ago without 
>> issue, so this all feels very new to me.
>>
>> Many thanks,
>>
>> Yann
>>
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>
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