I must admit, the design was inspired mostly by Firemylaser's 3d spirograph and LED Orb. The slip rings are a section of a collapsible antenna from a magnetic pick-up tool, and a flat metal disc. The flat disc creates lots of friction within the spinning of the device and also causes gaps in connectivity; next time I'll just use another section of antenna. (This is why I need to adjust it at 2:06 in the video.)
The mirror responds quite well to all frequencies. I haven't explored the limitations but it does cut out in mid-bass ranges.
Thank you! I haven't seen anything like this made before, so I thought you guys would like it
Do you have pictures? I'd love to see your project!