Abstract: A voltage controlled audio attenuator, of particular benefit in audio limiters, is created by configuring a nearly-balanced four-resistor bridge such that at least one of the branch resistors is implemented as a magnetoresistive element, located in a variable magnetic field, typically generated by a coil energized by current from an electronic driver which is made controllable from a DC control voltage, which is thus enabled to control the attenuation of the bridge. A suitable feedback processing circuit, receiving input from the bridge output and producing the DC control voltage in a predetermined dynamic relationship, forms the feedback branch of an automatic loop, thus the voltage-controlled attenuator is utilized as a key element of an audio limiter.