This is a stereo sound file
Listen using external speakers

To experience the Glissando Illusion, you should be seated in front of two stereophonically separated loudspeakers, with one to your left and the other to your right, as in the diagram. (Avoid using headphones.) Set the sound level so that it is on the soft side, and make sure that the channels are in balance.

This audio example is presented here in .MP3 format.