It's currently not possible to use audio to control Lumen directly. However, we do have plans to add an Audio Reactivity feature! That's on the roadmap to be developed after HD is released later this year.

Although Audio Reactivity is not yet available, Lumen's Syphon support means you can use third-party apps like Project MilkSyphon to respond to your audio and then further process the video in Lumen.