Here is a video link that may help the first reviewer:

https://video.hardlimit.com/w/ixE7Tc1pCqpP3BgriRbYA5 (https://video.hardlimit.com/w/ixE7Tc1pCqpP3BgriRbYA5)
The video walks you through how to play with an example configuration in emacs-geiser.

Thanks,

Joshua