Question: how to set mxr bass compressor?
Answer: The MXR Bass Compressor pretty much follows the 'classic' compressor control parameters. You get dedicated ATTACK and RELEASE controls, and for the RATIO setting there is a 4-way toggle knob that allows you to select between RATIO settings of 4:1, 8:1, 12:1 and 20:1. You will find an INPUT knob and an OUTPUT knob.