A much too short program of fascinating improvisation by Capece on bass clarinet, soprano saxophone, preparations and megaphone and Ulher on trumpet, mutes, radio and speaker. The impression that has stayed with me while listening to this disc again and again is one of motors. Motors and sympathetic resonance, as when a helicopter flies over the house and the motorsound mixes with the chopping air of the rotor and this in turn causes our big picture window to vibrate and thump. There's an awful lot of that kind of thing going on within these three improvised pieces. Rattling and ringing and gurgling with microscopic changes in timbre and pulse rate. One seemingly simple sound will quickly reveal itself to be made up of three or four components, which are all circling around each other and changing slightly as they do so. Sound fields end abruptly to reveal hidden components of others that continue. Air thumping in tubes accompanied by a tiny ringing sound and occasional intake of breath. Machines snoring and breathing deeply and an occasional familiar instrument sound.

I think that for a lot of listeners, what distinguishes good from bad in this kind of music is the choices that the players make � just which sound to make and when, for how long etc. Perhaps this is the perception alluded to in the title. For long periods during these recordings, the sounds made seem so perfectly combined that this kind of attention can't maintain itself for long. Listening on headphones is particularly engrossing, bringing out subtle aspects that I missed the first couple of times around, and it's very easy to forget exactly what you're listening to. Focusing on whether or not I like the sound combinations just detracts from the act of listening itself. The long central title piece is made up of short segments of sound combinations dove-tailed together in endless variety. Some sounds, like a hovering background wind-noise recur periodically, providing a sense of continuity or of familiarity, like we're still in the same spot even though the landscape keeps shifting, reminiscent of real life, while at the same time hallucinatory.