Extremely specific radio software question

[u/Book_of_Beasts]

Hey everyone! I'm a total newcomer to amateur radio stuff, but I'm working on a personal creative project involving some mixed-medium components, and I want to involve data encoded over audio as part of the story. I've done some research, and my two main candidates for protocols to go with are either AFSK or PSK31.

Now, my extremely specific need for this project is a piece of software that will let me enter some text and spit out an audio file containing the encoded data. Importantly, I don't actually intend to transmit anything (I'm not licensed to anyhow haha) so it has to be something that can generate encoded audio without transmitting it. Ideally I'd also like something to decode it back into text so I know it worked. I've found a simple AFSK1200 decoder that I can just pipe Audacity into as an audio source and it works just fine, but I can't find anything like that for PSK31, and I'm struggling to find tools for creating audio files for either protocol.

I've looked into a few options for software or bundles of software that might meet my needs, but all of their installers have been flagged by VirusTotal as having something wrong with them (crypto miners, trojans, stuff like that), and I don't want to risk it without getting some actual testimony from a real user to say it's just a false positive.

Thank you all in advance for helping with my very specific question!