Introduction An impulse response (IR) is a method for measuring the characteristic of a violin, or indeed any acoustic instrument, space or object that responds to sound. Convolution is a process that calculates the difference between two responses. IR Effect pedals take the input from your instrument and use a pre-determined convolution process to output a sound that represents the “target” instrument. They use different techniques to do this, but the intention is the same. The marketing goal of using an IR pedal is to be able to play an amplified violin and for it to sound like a chosen acou ..read more