I stare blankly at my stereo system, seeing everything, and nothing. Sometimes I experience synthesia (it comes and goes now) or I just come to, realizing that I've been half way into a trance of sorts. Very therapeutic.
Even without going full blown with the synthesia, those moments when I'm looking and seeing nothing and everything can be explained. My rig is just there but not really stimulating me visually. My minds eye, however is conjuring images of the performers with no real effort: it just happens.
All the best,
Nonoise