TRITONE PLAYER. Click the CF♯ button above. Does the pair of tones seem to rise, or to fall? Try several more pairs, such as FB or AD♯. Do they rise, or do they fall? Now check the box for looping and listen to the whole series. Do all pairs sound like they go the same direction (up or down)? While listening to the looping series again, click a tone pair opposite from one that you just listened to (e.g., FB to BF); the series may seem to reverse direction.