Adding Baked Audio Rotation to a pre-existing rotation I'm making a music video, and I would like the rotation of the below plane to be accelerated, but not absolutely determined, by the audio keyframe bake. 

In other words, I would like the plane to rotate continuously in one direction, and have this rotation be accelerated by audio form. 

So every time the audio spikes, the continuous rotation of the plane accelerates, then returns to a standard rate of rotation. 

As it is, just baking the f-curve, the plane just wiggles slightly between twitches between 5.9° and 0°, which is not a very interesting effect.
In Bake Sound settings (when selecting sound file) click on additive option: