@swmsk welcome to Vocalodon!
Here is a Mastodon server for vocal-synthesizers' likers.

We use Local Timeline(LTL) like chatroom.
Default settings of toot is "post to LTL", so you can join to LTL without option changes.

If you want vocal-synthesizer, we recommend Kaai Yuki, an elementary school girl VOCALOID known "kawaii".