Adjusting the level of an audio signal

Abstract

A system is disclosed for controlling the output level of an audio signal, in which a voltage controlled amplifier (18) is provided in addition to a high fidelity motorized fader (17). During normal (first mode) operation, the level of the audio signal is controlled directly by said fader, which may be adjusted in response to data from a storage device (23). On selecting a second mode of operation, the level of the audio signal is controlled by means of the voltage controlled amplifier, arranged to receive said stored data. In addition, said amplifier also receives trimming signals from said manually adjustable fader and movements of said fader in this mode are also stored, so that said modified data may be combined with the original data, to produce new data for use in said first mode of operation. The invention provides "trim mode" while providing a high fidelity resistive fader for normal operation.

Dependencies are inferred from the claim text.