Patent ID: 6901149

Claim:
An audio mixer comprising an effect algorithm processor inserted into each signal path of a plurality of channels of audio signals; an addition processor for performing an addition processing function of audio signals delivered from respective channels to deliver a single output signal; an in-plane position sensor for delivering the position of a maneuvered point on a operating surface in the form of a first and a second position signal which represent positions in orthogonally crossing two directions on the operating surface; a mode changeover switch for selecting one of different operating modes of the audio mixer, the respective effect algorithm processors having functions which are configured in accordance with the one operation mode selected by the mode changeover switch; and a controller responsive to the selected one operation mode selected by the mode changeover switch for concurrently controlling by means of the first and the second position signals delivered from the in-plane position sensor which are obtained by a single fingertip operation at least two of the functions of the effect algorithm processors and the addition processor.