[Coco] Speech Systems Symphony 12 & Piano attachment

[RETRO Innovations]

On 8/12/2025 5:57 PM, Brian Blake via Coco wrote:
> There were a number of MIDI carts out for the CoCo, and it looks like
> Speech Systems had at least two, maybe three before Lester Hands took over.
> I'm trying to track down when exactly SS stopped advertising and Rualaford
> Research started selling the CoCoMIDI 3.
>
If you find any information on the differences among the various carts, 
I'd be interested.

Jim


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