Question: I'm looking for a text-to-speech software that can convert documents into natural-sounding audio files for personal use.

For premium text-to-speech tools that turn documents into spoken-word audio files, NaturalReader is a top option. The software can handle a variety of file formats like PDF and Word documents and supports more than 50 languages. It's got AI technology, voice cloning and assistive technology for learning difficulties. With a variety of voices and the ability to download MP3 files for listening on the go, NaturalReader is available on the web, mobile devices and as a Chrome extension.

BeyondWords is another text-to-speech tool that can turn written content into an engaging audio format. It's got a full audio management system and supports more than 550 AI voices in 140 language locales. With voice cloning and automatic SSML normalization, it's good for uses like increasing engagement and generating revenue.

If you're looking for something simple but useful, Audioread offers super-realistic voices and works on multiple devices. You can convert text from emails, PDFs and other sources, and it'll create a private podcast RSS feed so you can listen later. Audioread supports 77 languages, so it's good for productivity and doing other things at the same time. Subscription plans make it relatively cheap for frequent use.