Creator here, also keen to know if anyone has suggestions. The r2d3 one was (obviously) a huge inspiration, it's such a nice way to learn things.
I can't seem to find it now, but either the NY Times or the Washington Post built something similar, for the 2018 US house/senate races. Lots of graphs as you scroll, with scroll-based events, IIRC.
EDIT: ah, how could I forget Nicky Case's explorabl.es! Was a huge inspiration for me as well.
With a single chord like this I think it sounds better to tune it with "just intonation". For a major chord it is [ f * 1, f * 1.25, f * 1.5 ]. With these frequencies the chord will not wobble.
I can't seem to find it now, but either the NY Times or the Washington Post built something similar, for the 2018 US house/senate races. Lots of graphs as you scroll, with scroll-based events, IIRC.
EDIT: ah, how could I forget Nicky Case's explorabl.es! Was a huge inspiration for me as well.