I’m using https://github.com/rhasspy/piper mostly to create some audiobooks and read some posts/news, but the voices available are not always comfortable to listen to.

Do you guys have any recommendation for a voice changer to process these audio files?
Preferably it’ll have a CLI so I can include it in my pipeline to process RSS feeds, but I don’t mind having to work through an UI.
Bonus points if it can process the audio streams.