Thank you this helps -- the "Music Genome Project" was part of this fork & schism. Pandora says little about it[0], and the open portions[1] were last updated in 2014.

At least someone's still at it, and all this helps me find my notes from that time.

https://github.com/LDugar/MusicGenome/raw/master/Decoding-th...

[0]http://www.pandora.com/about/mgp [1]https://github.com/omgDB