Fine-tuning

bard --chunk-size 500  # that's the default

This sets the maximum length (in characters) of a request. That means about 30 seconds of speech. The program will split up the text in chunks (according to the punctuation) and download them sequentially. The reading will start with the first chunk, that's why it is convenient to keep it small.

You can set that smaller or up to the maximum allowed by the backend (4096 for OpenAI).