There is no feedback informing you which setting you have selected. You must simply switch between them, and decide which one you like best. Usually,it is easiest to hear when the Surround mode is active, and once you have found that mode, you will know that the next two selections will be Standard and Studio. Here is an explanation of the three AKG N90Q Listening Modes: Three different spatial listening modes are provided. Each mode is characterized by a different spatial perception of the apparent acoustic surroundings. The first mode Standard renders the music unprocessed, like in any conventional headphone. This is useful in particular, if you use external processors such as Dolby headphone or DTS headphone X. The second mode Studio brings the sound stage to the front of the head, without adding any room effect, by means of a novel crosstalk circuit derived from a patented, simplified model of head-related transfer functions. The third mode Surround adds simulated reflections around the head, designed so that you perceive the sound stage at a greater distance, without disturbing artifacts such as coloration or reverb. The mode is changed by simply pressing and immediately releasing the button. (This is the same button used to trigger auto calibration). Music being played is temporarily interrupted; the mode is changed immediately, and a brief “brushing” sound is played to illustrate the acoustic effect of the new mode. The music then immediately resumes playing using the new mode.