[Coco] Speech Systems Symphony 12 & Piano attachment

[Mike Brant]

Would this connect to a midi keyboard?

On Tue, Aug 12, 2025, 2:37 PM Brian Blake via Coco <coco at maltedmedia.com>
wrote:

> Awesome! Thanks Rob! Do you think you could get clear enough pics ( without
> much trouble )  to recreate the PCB?
>
> On Tue, Aug 12, 2025 at 2:35 PM Rob Rosenbrock via Coco <
> coco at maltedmedia.com> wrote:
>
> > Yes, that’s it. It’s only needed to read the keybed in an 8x8 matrix, so
> > not a lot of hardware needed. I opened mine to confirm, and mine does say
> > stereo pack on the pcb.
> >
> > The ribbon cable is attached the same way - just tacked in without a
> > connector, and some lines aren’t used.
> >
> > Sent from my iPad
> >
> > > On Aug 12, 2025, at 2:08 PM, RETRO Innovations via Coco <
> > coco at maltedmedia.com> wrote:
> > >
> > > On 8/12/2025 10:43 AM, Brian Blake via Coco wrote:
> > >> Hi Rob, thanks for sharing this info.
> > >>
> > >> Is there any way you could take some pic of the cartridge PCB - top &
> > >> bottom? I'd like to get it documented and maybe try to reproduce it. I
> > have
> > >> a feeling items like these weren't sold in great numbers, and the
> > >> documentation is non-existent.
> > >>
> > >> The irony here is, now that I know what some of these items are, I'm
> > about
> > >> 90% convinced I had the cartridge at one point, and sold it along with
> > all
> > >> of my CoCo stuff in 2017. I had a long white Speech Systems cartridge
> > with
> > >> a single DIN port on it - I think it was 5 pins. I had no idea what it
> > was
> > >> for then...
> > >
> > > I *think* this is the cartridge folks are referring to:
> > >
> > >
> >
> https://www.facebook.com/groups/2359462640/posts/10162805383202641/?__cft__[0]=AZUliL9M8eYMGwoHCa3zbvScy1p73RMJSuzybYYHuKRfcXSvBoh-hAEsiINz7xQiqpUBrV_fNadY9bIfqwEnYYgnx5jDzR7QzZ9AMchsoF5xUS-L36UB9TKet4kWU-hcCQQ3ATza2LhT3yuHCfW_w7Ltfa0NAg_QUszA_L_YaHwzsEw2zoJqafa7Z04-uD3fqoDBZO32Q-13zDhvj5w3lzin&__tn__=%2CO%2CP-R
> > >
> > > (Yes, I know it's FB, but I don't think this list accepts pics...)
> > >
> > > It looks like a Speech Systems Stereo Pak that has been partially stuff
> > (PIA and decoding in place, but not R2R ladders or audio outputs)
> > >
> > > Jim
> > >
> > >
> > > --
> > > RETRO Innovations, Contemporary Gear for Classic Systems
> > > www.go4retro.com
> > > store.go4retro.com
> > >
> > >
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>
>
> --
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> --------
> Sarcasm is the body's natural defense to stupidity.
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