For various reasons I'm wanting to use a speech synth to do my singing for me. One of those reasons is that the last time I did any performance singing was several decades ago, my voice is very rusty. Everyone else's second hand tobacco smoke seeping into my room isn't helping my asthma nor my singing.
Most of what I have found seems to be based on closed source Windows backends that do the actual singing, used via WINE. Even though there is open source front ends, I don't want that, I want fully open source and Linux.
Festival has a singing mode, but it only works with the low quality voices. I want something better quality. The festival docs keep mentioning flinger for better quality, but that's no longer part of festival.
Are there any other fully open source alternatives for Linux that don't need WINE? For bonus points an Aussie accent voice.