If it is that difficult, I’m going to go out on a limb and say it’s probably going to be up to you to get added to your pi yourself, since it doesn’t have anything to do with gaming. I say this as a dedicated synth enthusiast.
It seems that only software that can be easily added via script (and so not needing additional maintenance by the good folks here) get added to the install script.
If you’re successful, I for one would like to know what sort of issues you run into. I’ve got another raspberry pi project in the works based on pure data. It’d be cool to have a sequencer running on that pi as well.
^^ my other hobby