When I play a video on Youtube, it looks like this:
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Then I run my tts reader, and it looks like this:
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To sum up the images, all applications that make sound that are not the tts reader are muted.

I have found the threads in Windows 7-8 that tell me to disable the sound when you get phone calls. That's not my problem. I have already tried it:
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I'm hoping there some new setting in Windows 10 that will turn this irritating feature off. I use my text to speech reader about a hundred times a day, and I use my other audio applications a hundred times a day. I don't want to have to constantly turn the volume back on when I am listening to anything - everything.