The variable LPF pre-filtering stages of the Ibanez ES-2 BBD delay pedal, at longest (red), middle (purple), and shortest (yellow) delay times.
A low end rolloff and high frequency emphasis can be seen on each of the curves. The steep anti-alias filter (60 dB/oct) changes its cutoff point, depending on the delay time setting. It goes about as low as 1.3kHz for the longest delay time (about 1 second, when the BBD chips are clocked at 4kHz).






