Comment by arafalov

The one I tried, had a lot of issues. It was a music theory book and it did not know how to pronounce C# (it kept saying C 'hash'). It also referred to, but did not read out the diagrams, or tables.

So, it was not just the voice, but the quality control pipeline that was missing as well.

Maybe it mostly works for old plain text books, but if nobody is checking.....