I'm looking to play the engine start sequence for a low bypass turbofan engine (like a modern jet fighter), then the steady sound of a jet running (might get higher pitch with a throttle setting (PWM from a Radio Control Receiver), and then a shut down sequence sound. Nothing terribly complicated I think.
My radio is an 11 channel model, so I was thinking of having two inputs to the arduino- one from an unused channel to turn the sound program on (just loop doing nothing until I get the signal from the RX to start the main program), then another input that Y's off the throttle control (or is mixed in if I have 2 extra channels).
So, you would flip a switch on the transmitter to cause the arduino to play the start sequence wave file of an F-16 (for example), then, once it is done playing the file, it holds the jet sound and looks for an increase/decrease of the throttle input. If the throttle goes up, it raises the pitch of the sound, if the throttle goes down, it lowers the pitch of the sound. It will then play the jet shutdown sequence wave file when the switch is turned off on the radio.