1declare id "12AT7 feedback"; // in amp tube ba.selector 2declare name "12AT7 feedback"; 3 4import("stdfaust.lib"); 5import("guitarix.lib"); 6 7/**************************************************************** 8 ** Tube Preamp Emulation stage 1 - 2 9 * 12AT7 feedback 10 */ 11 12val(x) = valve.vt(dist, q(x), x) 13with { 14 dist = 40.1; 15 q(x) = lp1tm1(x) * 1 - lp2tm1(x) * 1.02 - 1.0 : clip(-1,-0.01); 16 lp(a) = *(1 - a) : + ~ *(a); 17 lp1tm1 = abs <: lp(0.9999), _ : max; 18 avgs = lp1tm1 : avg; 19 avg_size = ma.SR/9; 20 avg(x) = x - de.delay1s(avg_size,x) : + ~ _ : /(avg_size); 21 lp2tm1 = avgs : lp(0.999); 22}; 23 24tubeax(preamp,gain1) = hgroup("stage1", stage1) : 25 hgroup("stage2", stage2) 26 with { 27 28 atten = 0.6; 29 stage1 = tubestage(TB_12AT7_68k,86.0,2700.0,2.617753) : - ~ (atten*tubestage(TB_12AT7_250k,132.0,1500.0,1.887332)) : *(preamp): 30 fi.lowpass(1,6531.0) : tubestage(TB_12AT7_250k,132.0,1500.0,1.887332): + ~ (atten*tubestage(TB_12AT7_250k,194.0,820.0,1.256962)); 31 stage2 = fi.lowpass(1,6531.0) : tubestage(TB_12AT7_250k,194.0,820.0,1.256962) : *(gain1); 32 33} ; 34 35process = val : component("gxdistortion.dsp").dist1(drive,wet_dry) : tubeax(preamp,gain1) with { 36 drive = ampctrl.drive; 37 wet_dry = ampctrl.wet_dry; 38 preamp = ampctrl.preamp; 39 gain1 = ampctrl.gain1; 40/* 41 drive = vslider(".gxdistortion.drive[alias]",0.35, 0, 1, 0.01); 42 wet_dry = vslider(".gxdistortion.wet_dry[alias]", 100, 0, 100, 1) : /(100) : smoothi(0.999); 43 preamp = vslider(".amp2.stage1.Pregain[alias]",0,-20,20,0.1) : ba.db2linear : smoothi(0.999); 44 gain1 = vslider(".amp2.stage2.gain1[alias]", 6, -20.0, 20.0, 0.1) : ba.db2linear : smoothi(0.999); 45*/ 46}; 47