Duplicate code in recalculateCoefficients

[ghost]

Fwiw, this code...

if (type === DSP.PEAKING_EQ || type === DSP.LOW_SHELF || type === DSP.HIGH_SHELF ) {
A = Math.pow(10, (this.dBgain/40)); // for peaking and shelving EQ filters only
} else {
A = Math.sqrt( Math.pow(10, (this.dBgain/20)) );

can probably be replaced with...

A = Math.sqrt( Math.pow(10, (this.dBgain/20)) );