Mira Optical Compressor,Walrus Audio Mira Compressor Pedal | Sweetwater,Walrus Audio: MIRA OPTICAL COMPRESSOR,Guitar Pedal X - GPX Blog - Walrus Audio Releases Second Evolved Compressor Pedal - the 8-Controls Mira Analog Optical Compressor,Walrus Audio's Mira is a studio-like optical compressor pedal you'll both hear and feel,