Play/Pause button doesn't start/stop "Isochronic Tone" and "Binaural Beat"

"Binaural Beat" and "Isochronic Tone" generators don't follow the Play/Pause behavior of the ambient sounds.

I think it should, and I'm happy to look into the code to figure out a fix. But only if you believe this is aligned with your vision for these features and the project.

Thanks for your amazing work!
