This setting will gradually adjust the tempo of the music to your measured pace. It is nice if you want to start slower and then quicken your pace. The music will speed up to match. This is a little different than the normal mode of enTrainer, where you use the music to keep you steady on your target cadence. In earlier versions of the app, it was called Adaptive Sync, Music Follow Me seems better.
Beat induction is the process in which a regular isochronous pulse is activated while one listens to music (i.e. the beat to which one would tap one’s foot).
Biology (of a rhythm or something that varies rhythmically) cause (another) gradually to fall into synchronism with it.
[ no obj. ] (entrain to) fall into synchronism with (something) in such a way.
Brainwave entrainment, the practice of entraining one’s brainwaves to a desired frequency.
Entrainment (biomusicology), the synchronization of organisms to an external rhythm.