SoundManager is the main class for handling sound. It contains all the global sound settings and also manages individual SoundComponents.
Also check Sound page.
Master settings affect all the
Each sound component belongs to one of the Audio Mixer groups: Engine, Transmission, SurfaceNoise, Turbo, Suspension, Crash or Other. Here you can add additional effects and modify the sound. One example of this is distortion which is added to the engine sound based on load through the Audio Mixer.