I created MacBook display and keyboard backlight controller (with sound!) called “MacBookLighter” based on openFrameworks.

Just drag top two sliders(display brightness & keyboard brightness)

Audio reactive mode
1. Type frequency in the text input bar.
2. Drag range slider(brightness range).
3. Put audio reactive I/O button.
4. Audio sthreshould, audio peak decay, audio max decay can be controlled at Audio setting sliders as well.

Demo video

Source code:

– openFrameworks 0.9.3+
– ofxDisplayBrightness
– ofxKeyboardBacklightBrightness
– ofxUI
– ofxXmlSettings
– ofxFFT