I have yet to set up my Wi-Fi interface unit and was wondering if the device paired with it will still be capable of sound transmissions? I like to install Blue tooth sound receivers into my rolling stock and transmit train sounds that I have personally recorded or sounds from my train sounds app, also Railroad music and Polar Express sound tracks. I do know Bachmann's Bluetooth control app will transmit engine sounds within the command transmissions, but MTH commands don't contain sound. Has anyone tried this? I may have to use a second device for my sounds.
Another fun Bluetooth sound project, is transmitting the engine sounds to a hi wattage stereo system by jumping wires off of the engines speaker to a 3.5 mm female jack, creating a place to plug in a Bluetooth transmitter, then sending your engine sounds to a paired receiver at the stereo system. What a rush when it sounds like a real train is going to come out of your mountain on the layout. Just make sure the wife isn't home when you do it. The only thing I worry about though, will I have Bluetooth signals crossing and cause lose of control using the interface unit?