~I950,850; X1.35; Y1.7; *FIRST.PLT; X1.0; Y1.0; I850,20; F9 Figure *** - Typical impulse response of first-order all-pass reverberator ~I1800,850; X1.35; Y1.7; *SECOND.PLT; X1.0; Y1.0; I1650,20; F9 Figure *** - Typical impulse response of second-order all-pass reverberator