Check the listing for details. PRS Mary Cries Optical Compressor Effects Pedal. Condition: New. Listed at 219.00 USD. The Wind Cries ... Paul If you’re after a supremely smooth and musical typical of compression, it’s hard to beat the time-tested tone of an optical design. The PRS Mary Cries compressor effects pedal is based on one of the most revered optical compressors of all time, putting the power and tone of countless classic hits into your hands, with a few modern enhancements. Thicken up your tone, rein in signal peaks, improve sustain, organically boost your sound: the Mary Cries does it all while perfectly retaining your signal’s clarity and definition. A simple 2-knob control scheme containing an Output Gain and Compression control are all you need to sculpt, squash, and temper your tone, allowing for quick and effortless adjustments, even mid-song.