I'm not well-versed enough into "modern" web stack to troubleshoot, but there is something wrong with the scrolling on their website. Doesn't inspire much confidence into web audio. I'm not entirely sure why browser would be a good fit for an audio synth plateform, to say the least.
Faust is nice tho, a combinator language with stream processor semantics. There are lots of things to improve (quality of life things for organizing code, more typing, better semantics for the surface language which currently is ugly macro expansion where it could've been a simple lisp or even better a mini-ML), but it's also currently one of the best thing in town for functional synthesis.
It follows the design patterns of many node-based programming environments, so to call it a ripoff of Max/MSP is unfairly harsh. The theme in the second half of the video looks a lot closer to VVVV than Max.
It's not a "rip-off" - it's a derivative. "Patcher" was Miller Puckette's original (internal) name for Max, and there has been an open-source line of the family for 25 years in Pure Data. You can read the history by the man himself here: http://msp.ucsd.edu/Publications/dartmouth-reprint.dir/
Calling it a rip-off is like calling Guille a rip off of Scheme.
Yes, well "The Patcher" was the original pre-release name of Max (before it was Max/MSP it was Max), and at various points there have been other incarnations of it, including JMax, and (still current), PureData by the original author. This is definitely a hats off to that. There's a great a paper by Miller Puckette, the author, on the history. http://msp.ucsd.edu/Publications/dartmouth-reprint.dir/
Most of the files seem to be presentation slides, only a few play any audio.