If we want to say that someone "is listening music", then what do we
use ? {'Ij} or {Qoy} ? Or both ?
I don't think we know this one either, but Okrand makes a distinction between the verbs in TKW:
The verb Qoy means "hear," not just "listen." One must actually perceive and understand that which is being said.
This doesn't tell whether one does Qoy or 'Ij to
music, but it implies that one can 'Ij without actually
Qoy-ing anything. 'Ij seems to be the active attempt
to detect sound; Qoy is the passive fact that sound has
been detected.
-- SuStel http://trimboli.name