Equalizer for guitars

EE October 1986 by W Teder 24 Table I. Corre- lation between resistance and attenuation. Table 2. Corre- lation between musical notes (orchestral pitch), their fre- quencies, and required resist- ance for the LOMID filter section. The musical notes are shown here in inter- national electro- acoustic notation, i.e. they are given inferior or superior ex- ponents to indi- cate how many octaves they are below or above their namesake 112 the octave commencing with middle C (261.63 Hz). Table 1 Resistance Ra = lk//12 k Rb = 680//6k8 = Rc = Rd = Re = Rr = Rg = Rh = FL = Ri = 220/12k2 = lkfi1k5 = 470//6k8 = 470//4k7 = 560//1k8 = 3301/15k = 390//1k = 2701/1k8 = EQUALIZER FOR GUITARS Equalizers are used to change the normal sound of an instrument by filtering certain frequencies or bands of frequencies. Graphic equalizers are the best for this; but they are difficult to construct and fairly expensive. Fortunately, a parametric equalizer is a satisfactory alternative, more easily constructe...