low quality samples
This voice actually requires some input from your end to improve the sample quality.
Visit this https://app.resemble.ai/voices and you can edit the dataset and fix what the system is prompting to improve quality of samples.
An additional solution for low quality sample voices is to activate all of the samples and force train.
After that, listen to them and compare them to the ones that were marked high quality, if you're satisfied you can keep them.