William Sawaya was inspired by the well-known acoustic instrument in designing the Diapason armchair for Sawaya&Moroni, characterized by the wooden structure in solid ash that takes up in its development - extended from the support on the ground to the support of the padded backrest - the repeated wave of the tuning fork , giving the seating collection a flavor of musical frequency translated into a successful and comfortable piece of furniture. In music, the tuning fork has various meanings: it commonly indicates an acoustic instrument capable of generating by vibration a standard note on which musical instruments are tuned. The frequency at which the tuning fork oscillates generates on a graphic level a long almost infinite wave, symmetrical with respect to the horizontal axis and by interval amplitude. The same collection also includes an easy chair and a chair.