Check the listing for details. Walrus Audio Highpoint Optical Compressor Pedal. Condition: New. Listed at 349.99 USD. Studio-quality Optical Compression for Your Pedalboard Optical compressors have long been the studio engineer’s secret weapon, lending depth, dynamic control, and sonic refinement to every audio signal they touch. Packing studio-caliber optical compression into a stompbox enclosure, the Walrus Audio Highpoint allows you to infuse your guitar tone with the same level of expansive sustain, articulate transient response, and smooth-sounding musicality. Additionally, a comprehensive feature set gives you exacting control of Threshold, Ratio, Attack, and Release — a standard of precision rivaling that of a high-end rackmount unit. You also get a Makeup knob for fine-tuned gain staging and a Blend knob for straightforward parallel compression.