The idea is to point the device, detector, to an area of interest. For example, if using the V/IR one can point the device at a pool of water or clouds and the detector picks up the signal then transmits an audio signal to the 1/8" output jack. From the jack you can connect speakers or a recorder. The output is the audio signal of the frequency or energy of the light wave received at the detector.
This is the device that I will use to collect audio samples, the basis for the tracks within song.