there already is an "app" - its the webpages for PAW> where you can change the volume, mute unmute. But UI/UX is awful. Particularly inflight.
secondly, i like to run a sterile cockpit. i suspect the large majority of people that run PAW also have a tablet of some form. what i definetly dont want it to run another cable and have a physical volume controllter just to control PAW
I'm using the audio direct from the Rosetta and would rather not have to mess about with a tablet or phone to control the volume.
I already have a volume controller to control the audio volume from the PAW but it doesn't do an instant mute/unmute. It works well but the wheel is quite small. It is a potentiometer that dims the audio connection
It's a contradiction to have an EC device with an audio traffic service that does not take your eyes back into the aircraft from a good look out but then needs screen/tablet interaction and searching for virtual buttons or changing screens.
You don't need physical access to the PAW in flight, just a cable connected.
The other solution would be to allow Bluetooth control of the PAW via a remote button like that used in a car to remotely control any media player.
I have such a BT controller that is used to control my eink moving map navigator for PG, rather that trying to control an eink tablet via touch, I have this remote button cluster that will allow me to zoom in or out, then go to different screens.
This:
https://www.ebay.co.uk/itm/225067720830
You would only need to map the volume buttons correctly and use the play/pause button for mute/unmute.
I've used one of these and and it's highly effective for reducing workload whilst flying.