US Patent 10048667 Knob for an electric mixer

A mixer controller includes a housing for audio processing equipment having a device surface and a front edge, and a plurality of audio processing devices mounted on the device surface. The plurality of audio processing devices include at least a first channel and a second channel. The mixer controller includes a cross-fader that controls an amount of audio output from the first channel and output from the second channel by sliding the cross-fader between a first position and a second position. The cross-fader includes an extension, the extension having an end that extends forward of the front edge of the housing.