GPigChinPE.par 2 Filter order. 0.0 Pre-attenuation for filter (dB). 1000.0 Lower, 3 dB down cut-off frequency (Hz). 30000.0 Upper, 3 dB down cut-off frequency (Hz). PreEmph1.par 2 Filter order. 0.0 Pre-attenuation for filter (dB). 450.0 Lower, 3 dB down cut-off frequency (Hz). 8500.0 Upper, 3 dB down cut-off frequency (Hz).