Matching the audio pitch to the animation speed

Many artifacts sound higher in pitch when accelerated and lower when slowed down. Car engines, fan coolers, a record player... the list goes on. If you want to simulate this kind of sound effect in an animated object that can have its speed changed dynamically, follow this recipe.

Getting ready

For this recipe, you'll need an animated 3D object and an audio clip. Please use the animatedRocket.fbx and engineSound.wav files, available in the 04_08 folder.

How to do it...

To change the pitch of an audio clip according to the speed of an animated object, please follow these steps:

1. Create a new Unity 3D project.
2. Create a new Modelsfolder in the Project panel, and into this import the provided animatedRocket.fbx file.
3. Create a new Sounds folder in the Project panel, and into this Import the provided audio clip, engineSound.wav.
4. Select the animatedRocket file in the Project panel. In the Inspector for animatedRocketImport Settings, click the Animations button...