in ticket #2112.
Fixed:
1) Sign of X-coord of sound sources on RHS of aircraft changed to
negative, was posititve so all sounds came from LHS
2) Propeller effect, turboprop1.wav pitch changed to depend on
propeller rpm, was affected by engine N1 rpm; the sound is of a
propeller, which is a constant speed prop
Enhancements:
1) Propeller sound volume made to depend on torque to give audible
signal as throttle is changed.
2) Turbine effect added, volume depends on fuel flow, pitch depends on
engine N1 rpm
3) Gear, tyre squeak volumes balanced to match changed effects.
