Why has my Galaxy S6 stopped streaming sound?

A

AC Question

Galaxy S6 has stopped streaming sound

Streamed stuff worked really well for months before this!

I use it every day to stream Dronezone, local firecalls, and Basedrive. About a week ago it stopped working.

Sound with flash stuff like YouTube vids play fine. Google Maps voice works fine. All the other notifications work fine. I can see network activity that shows the content is actually streaming into the phone but no sound results.

I have very few apps installed (voluntary wise anyway) and they're non-sound related apps anyway.

I've rebooted the phone several times with no improvement.
I've confirmed Music Auto OFF is set to off. Tried a few ON times too with no effect.

Any ideas to check?