Have some code that does this currently but there is a quality issue. Quality is very poor after conversion using Naudio. It seems ok till last second or two of each file. It must be a bug in Naudio or my code.
A coder on here has been hassling me, basically been sending me code I already have and asking for money.
I have seen the issue and its with the ssml markup. Nothing to do with nAudio or my conversion. So will be closing the project.
Sending text using ssml format with Amazon Polly gives a different result when compared to getting the mp3 back by sending text in text format.