The music does serve a specific purpose. The Seba track is chosen for its 80s style synths (itself a reuse of Vangelis' Blade Runner soundtrack), which separat

The music does serve a specific purpose. The Seba track is chosen for its 80s style synths (itself a reuse of Vangelis' Blade Runner soundtrack), which separates cleanly in the FFT and enables the audio response to follow individual notes. The Selah Sue track is chosen for its low bpm and jazz style vocals, which can easily be synced to a 6 DOF camera running at a constant speed on spline tracks without causing significant motion sickness. Trust me, you don't want to ride that thing on dubstep. Neither demo could be accomplished without specific requirements in music, whether it's these songs or others, and each is a novel demonstration of web technology. The full source is on github, there's commentary and accurate, live diagrams of the internal mechanisms. I don't deny that this is skirting the rules a bit, but the educational goal is genuine. I'm a DSP engineer. What's the difference between me slapping a commercial MP3 on a research project involving real-time graphics and audio processing, and a colleague using a copyrighted Playboy centerfold (1) to demonstrate their image processing algorithm? Also chosen for specific purposes: it contains a complex mix of textures that shows flaws in algorithms well, and is a plausible real world use case too. For an encore, the server is configured to make pirating the songs from me as inconvenient as possible without compromising the demonstration. (1) http://en.wikipedia.org/wiki/Lena_Söderberg http://en.wikipedia.org/wiki/Lena_Söderberg