[Coco] Speech Systems Symphony 12 & Piano attachment

[Rob Rosenbrock]

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
> 
> 
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