Don’t know much about the training side of things, but I have Piper set up with home assistant using the Wyoming protocol and it just goes. Some of the out-of-the-box voices are pretty decent too.

You may need to log out and log back in for the addition of the sudo group to take effect.

The default config sudo should be fine, but if the above doesn’t work then you may also want to look up “visudo” to check/modify the sudo config.

Must be a problem with floating point precision.