I have a TCL Roku Tv and have turned on the screen reader (audio guide) because I am blind. The voice is not clear, mumbling is the best description I can think of so: 1. I tried changing the speed to see if that would help. No. 2. I changed the volume to see if that might help. No. Now, as it continues to mumble, I am wondering if there is any way to: 1. change the voice being used or 2. set the speech in some way that the voice would be clearer. I am very familiar with screen readers having used them for 26 years and I have the Spectrum audio guide which speaks more clearly. Looking for any ideas that might help this Old Maine Boy hear the guide better. Thanks.