RDL ST-GCA3 Automatic Gain Control Amplifier with Switch-Selectable Adjustment RateThe ST GCA3 constantly adjusts for changes in input levels, bringing up low levels, and reducing gain for high levels. The audio level is constantly adjusted to maintain the correct output. The AGC adjustment rate is switch selectable. Making audio levels uniform and consistent improves the performance of nearly any type of audio system, and the ST GCA3 SLOW mode is ideal for leveling music sources. The FAST setting of the ST GCA3 makes it ideal for