[asdff]

Bose used to have some pre internet system that recognized the song you liked to play right after another song (like in a random shuffle) and attempted to learn what you liked to hear, and queue up the song you were likely to skip to anyway. No idea how they pulled it off since this must have been on hardware from 15 years ago iirc.

[tintinmovie]

Ah yes Bose uMusic. From the manual it extracts 30 feature points from the songs to define your preference.

uMusic patent: https://patents.google.com/patent/CN1637743A/en

Further reading: http://products.bose.com/pdf/customer_service/owners/uMusic_...