NEW iRacing VDASH-EMU Custom Display is available at EKSIMRacing.org forum
As you see it includes a cool feature to control volume/channel of RADIO/SPOTTER.
VSDASH-EMU is powerful and in addition to telemetry values or gauges or dials you can easily create a custom display with controls like push button or encoder or switch map them to MACRO (sequence of keystrokes) and drive your game or simulation with it. 😉
DOWNLOADÂ (you need to be fully registered as GOLD or PRO to access this area)
Cheers,z