V1.7

This version includes audio when connected via Wifi. It will only work on scanners that have wifi connectivity. SDS200 and BCD536.
It will not transfer audio over USB connections.

Only one app can be streaming audio from a scanner at once, so if you have Proscan or something similiar connected there will be no audio.

Caveats:
Audio either works or it doesn't. There is no error message displayed.
You cannot stop the audio while the app is running, you need to swipe away the app to stop audio.
If you lose wifi connection to the scanner, audio will stop and not automatically restart.
The audio will be delayed, so the display and audio will not be in perfect sync.
I have noticed the audio can be choppy for the first minute or so.
Overall, it can be a bit finicky to get working.

If you cannot get it working, try rebooting the scanner. The SDS200 seems to require this more than the 536.

To be able to install this from Google play, please send me your email address and I will add you to the beta tester list.
Anyone already on the list should be able to update through Google Play.