How we perceive the time matters!!!.

 Until now, standard metronomes have consisted of a pendulum or a blinking  light to indicate the tempo. A standard pendulum metronome must be placed  directly in the vision path of the musician. Additionally, the short distance that the pendulum travels results in a loss of perceived resolution of the time within the beat for the musician. Metronomes with a blinking light to display the tempo are even more difficult to see by one person (or especially by more than one), and give absolutely no indication to the musician to the fractional time within each beat. The laser metronome displays time in a way that is most easily perceived and processed by the brain. From a neurocognitive standpoint it is superior to either pendulum or blinking metronomes. The size of the arc can be adjusted so that the intra-beat time is much more perceptible. The lack of an audible 'click', 'beep' or other sound results in the musician being acutely aware of where he is in relation to the beat, without the intrusiveness and rigidity of a purely audible signal. The music can 'breathe' without feeling like you are struggling against the lockstep rigidity of an audible click.