opcode FltStatic, 0, iKK ; GC !!!
	iType, kFreq, kRes xin
	ain zar 2; CHANGE
	ahp, alp, abp, abr statevar ain, kFreq, kRes 
	; balance ???
	if (iType == 0) goto Lowpass
	if (iType == 1) goto Highpass
	aout = abp
Lowpass:
	aout = alp
	goto run
Highpass:
	aout = ahp
run:
	zaw aout, 2 ;CHANGE
endop