ar pareq asig, kc, iv, iq, imode
Implementation of Zoelzer's parametric equalizer filters.
iv - amount of boost or cut. Positive values give boost, negative values give cut.
iq - Q of the filter (sqrt(.5) is no resonance)
imode - operating mode
kc - center frequency in peaking mode, corner frequency in shelving mode.
asig - the incoming signal
instr 15 ifc = p4 ; Center / Shelf iq = p5 ; Quality factor sqrt(.5) is no resonance iv = ampdb(p6) ; Volume Boost/Cut imode = p7 ; Mode 0=Peaking EQ, 1=Low Shelf, 2=High Shelf kfc linseg ifc*2, p3, ifc/2 asig rand 5000 ; Random number source for testing aout pareq asig, kfc, iv, iq, imode ; Parmetric equalization outs aout, aout ; Output the results endin ; SCORE: ; Sta Dur Fcenter Q Boost/Cut(dB) Mode i15 0 1 10000 .2 12 1 i15 + . 5000 .2 12 1 i15 . . 1000 .707 -12 2 i15 . . 5000 .1 -12 0 e
Hans Mikelson
December, 1998 (New in Csound version 3.50)