[AudioI] Eurorack breakout for the Octo sound card?

[jk van k]

Hi all,

Here another happy user of 2 octo's and 2 ultra's :)
Sometime on the list there was a discussion about the octo card and DC.

It can  be done rather simply by removing the caps (bridging) on the rca
breakout. then simply veroboard the male rca's and female mono minijacks
together with some opamps (to amplify, shift/bias) and put the jacks on a
panel - is my plan.

Of course an alternative breakout with minijacks, amps and without the caps
in shop will be nice, and will likely attract more attention to octo - it's
one of the few well working multichannel soundcards for rpi (the only?).

Bela(beaglebone) platform has pepper and salt modules, and works well, but
is more expensive...

I was also thinking the ultracard could work as an ad converter (stereo
spdif) in an euro system.

Jan kees

On Fri, 25 Mar 2022, 03:30 Matt Flax via People, <
people at lists.audioinjector.net> wrote:

> I think all codecs can support DC signals. The Pro. soundcard implements
> the AIABS v1.
>
> Releasing schematics is a possibility, but perhaps later.
>
> Matt
>
> On 25/3/22 12:22, Marc Lavallée wrote:
> > Hi Matt,
> >
> > I notice that the Ultra 2 sound card supports DC signals; I guess this
> > capability partly depends on the codec (CS4265).
> > The Octo is using the CS42448 codec; can it also support DC signals?
> >
> > Are you planning to release the schematics for the stereo version of
> > the modular preamp?
> >
> > Thanks
> > Marc
> >
> > Le 2022-03-24 à 18 h 00, Matt Flax a écrit :
> >> Hi Marc,
> >>
> >> Nice to hear from you.
> >>
> >> We've got a few artist focused products in the pipe line.
> >>
> >> Second in line will focus on a modular suitable preamplifier. The first
> >> version of that will be stereo focused. It will use tip-sleeve 3.5mm
> >> jacks for the input and output. The reason we will release a stereo
> >> version first is because it will easily plug into the AIABS v1 soundcard
> >> boards.
> >>
> >> In the future we would like to implement a new standard for multichannel
> >> soundcards.
> >>
> >> Matt
> >>
> >> On 25/3/22 07:34, Marc Lavallée via People wrote:
> >>> A while I acquired an Octo sound card (for the RPI).
> >>>
> >>> I have a few projects that could use it, one of them for Eurorack
> systems.
> >>> But the Eurorack specs requires audio at 10Vpp (from -5V to +5V)
> >>> and no AC filtering.
> >>> For example:https://www.expert-sleepers.co.uk/es8.html
> >>>
> >>> Would it be possible to create an Eurorack breakout for the Octo?
> >>>
> >>> Marc
> >>>
> >>>
> >
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