I'm using responsivevoice.js JavaScript library to listen to articles online. It's the best free Text-to-speech I found, better then lots of paid ones I tried, but I need to download the audio as well and I have no idea on how to do that. Any ideas on how could I do that ? Or is there any other good Text-to-speech, with unlimited characters and download capabilities ?
I made a quick demo to better illustrate the situation.