Hi list and maintainer(s) of the Octo driver,

My advice to Ryan was useless, and after a few tests it appears that with kernel 6 (as used by the latest Raspian) there large noise (at maximum level),  generated internally, for all inputs.

https://github.com/Audio-Injector/Octo/issues/64

Marc

Hi Ryan,

My experience: it's better to use a realtime kernel or a newer version of the kernel that support realtime scheduling (I had some success with kernel 6.0) , even more on small computers (like the RPI). Also, PureData is not the best software for low-latency audio (Supercollider, for example, is much faster). Configuring Linux for audio is tricky; you may try using this script to guide you: https://codeberg.org/rtcqs/rtcqs. Or you can use a RPI OS already configured for audio like https://blokas.io/patchbox-os/ ; I personally don't have experience with a pre-configured OS for audio, because I prefer to configure the OS myself.

I hope it helps, and good luck!

Marc

Le 2023-06-05 à 15 h 59, Ryan Stanley via People a écrit :

Does anyone have any advice on this? I still am unable to get OCTO to work with PureData. Has anyone else had luck with it? 

Thanks,

Ryan Stanley

904-806-8104

On Fri, Jun 2, 2023 at 8:06 AM <people-request@lists.audioinjector.net> wrote:

Today's Topics:

   1. Difficuly getting OCTO to work with PureData (Ryan Stanley)


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Message: 1
Date: Thu, 1 Jun 2023 13:52:33 -0400
From: Ryan Stanley <ryan7585@gmail.com>
To: people@lists.audioinjector.net
Subject: [AudioI] Difficuly getting OCTO to work with PureData
Message-ID:
        <CAJ6-2+nExxZdgXSGTxSo9U6fyQq-ugLyY9GRYYOdTJ+Mgdbupw@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

Hello everyone. I was able to get the OCTO card working (in some ways) on
my Raspberry Pi 4B after reverting to Raspbian Buster (version from
2/5/2020), and following the manual installation instructions except for
the part where you update the Linux Kernel. However it still is having
trouble with PureData. When I send an input to an output, the audio passes
through un-distorted... But when I insert any objects into the signal chain
(even just a [*~ 0.5] volume reduction), everything gets garbled, almost
like a bitcrush style distortion. It almost seems like what passes thru is
some sort of weird multiplexed version of the audio or something.

Does anyone know what might be wrong?

Thanks,
Ryan Stanley
904-806-8104
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