I think I answered my own question and will look into OSProcess /
CommandShell.
I've built an Emacs frontend for the system already, Squeak should be
interesting :)

On Wed, Jan 5, 2022 at 2:59 PM David O'Toole <deeteeoh1138 at gmail.com> wrote:

> Is it possible to communicate with a Lisp interpreter via standard I/O
> running as a subprocess? I am considering building a Squeak graphical
> frontend for a musical project that is written in S7 Scheme.
>
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