1declare id "12AU7 feedback"; // in amp tube ba.selector 2declare name "12AU7 feedback"; 3declare samplerate "96000"; 4 5import("stdfaust.lib"); 6import("guitarix.lib"); 7 8/**************************************************************** 9 ** Tube Preamp Emulation stage 1 - 2 10 * 12AU7 feedback 11 */ 12 13val(x) = valve.vt(dist, q(x), x) 14with { 15 dist = 40.1; 16 q(x) = lp1tm1(x) * 1 - lp2tm1(x) * 1.02 - 1.0 : clip(-1,-0.01); 17 lp(a) = *(1 - a) : + ~ *(a); 18 lp1tm1 = abs <: lp(0.9999), _ : max; 19 avgs = lp1tm1 : avg; 20 avg_size = ma.SR/9; 21 avg(x) = x - de.delay1s(avg_size,x) : + ~ _ : /(avg_size); 22 lp2tm1 = avgs : lp(0.999); 23}; 24 25tubeax(preamp,gain1) = hgroup("stage1", stage1) : 26 hgroup("stage2", stage2) 27 with { 28 29 stage1 = tubestage130_10(TB_12AU7_68k,86.0,2700.0,1.257240) : - ~ tubestage130_10(TB_12AU7_250k,132.0,1500.0,0.776162) : *(preamp): 30 fi.lowpass(1,6531.0) : tubestage130_10(TB_12AU7_250k,132.0,1500.0,0.776162): + ~ tubestage130_10(TB_12AU7_250k,194.0,820.0,0.445487) ; 31 stage2 = fi.lowpass(1,6531.0) : tubestage130_10(TB_12AU7_250k,194.0,820.0,0.445487) : *(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