ratio

In guitar effects, ratio is a comparison between two quantities, and the term appears in several distinct contexts. In compressors, ratio sets how much gain reduction is applied, with settings such as 8:1 or a maximum of 10:1, and backing off the ratio can take a pedal from heavy squash to subtle sustain¹². Ratio also describes wet to dry balance in echo effects³, fuzz to distortion blending⁴, and signal-to-noise ratio, a measure of desired signal against noise⁵⁶⁷. Delay pedals use golden ratio timing between repeats⁸⁹, and a JFET stage can be biased for a specific THD ratio¹⁰.