+1 on that request .. would be very useful!
I created a sensor emulator, it runs as a separate app in the emulator, and allows sensors to be created by lua expressions and these emulated sensors appear as normal sensors in all the other apps that are loaded. It can do normal numeric sensors as well as GPS sensors, where you can specify a parametric curve of a flightpath and it generates the values the GPS sensor would provide on this path.
It works by taking over the Jeti API calls for the sensors. I also take over some other calls, including the sound output API calls, stick vibration, etc .. so I can print in the emulator console what the API calls were.
So while you can't hear the wav files you do get a console log of what files were called and it helps with debugging. PM me if you want to try it.