IK Multimedia Bus CompressorThe Bus Compressor is based on the mix bus VCA type compressor of a worldwide known and acknowledged British large format mixing console from the 80's. It was used on practically every hit record and major production from the 80's to present days, so much that its sound has almost become a trademark. This compressor was so widely used that it later became a stand alone rackmount unit, so that it could be used separately from the large format console.