J Hendrix Fuzz Face

Today is raining here, so I play around with our Ampsim toolkit.
Well, lets try to emulate the Fuzz Face of J. Hendrix, I said to myself.
First step is to create the schematic of the unit.
Here it is:

Now, create a (python) build script to generate faust source code
with our DK simulator in our Ampsim toolkit.

import os
from analog import *

schema = "Fuzzface2.sch"
path = "tmp"
module_id = "fuzzface"
mod = os.path.join(path, module_id+".so")

# create plugin
c1 = Circuit()
c1.plugindef = dk_simulator.PluginDef(module_id)
c1.plugindef.name = "Fuzz Face"
c1.plugindef.description = "J Hendrix Fuzz Face simulation"
c1.plugindef.category = "Distortion"
c1.plugindef.id = "fuzzface"
c1.set_module_id(module_id)
c1.read_gschem(schema)
c1.create_faust_module()

and yep, start guitarix and found the new plug in the Distortion category. Wow, sounds great. That will be enough for me to play with today. :D

Maybe the one or the other will try it, no problem, it's in the guitarix git repository allready.
And for those how use faust by themselves, here is the resulting faust source:

 // generated automatically
// DO NOT MODIFY!
declare id "fuzzface";
declare name "Fuzz Face";
declare category "Distortion";
declare description "J Hendrix Fuzz Face simulation";

import("filter.lib");

process = pre : iir((b0/a0,b1/a0,b2/a0,b3/a0,b4/a0,b5/a0),(a1/a0,a2/a0,a3/a0,a4/a0,a5/a0)) with {
    LogPot(a, x) = if(a, (exp(a * x) - 1) / (exp(a) - 1), x);
    Inverted(b, x) = if(b, 1 - x, x);
    s = 0.993;
    fs = float(SR);
    pre = _;

        Volume = 1.0 - vslider("Volume[name:Volume]", 0.5, 0, 1, 0.01) : Inverted(0) : LogPot(0) : smooth(s);

        Fuzz = 1.0 - vslider("Fuzz[name:Fuzz]", 0.5, 0, 1, 0.01) : Inverted(0) : LogPot(0) : smooth(s);

    b0 = Fuzz*(Fuzz*(Volume*pow(fs,3)*(4.76991513499346e-20*fs + 5.38351707988916e-15) + pow(fs,3)*(-4.76991513499346e-20*fs - 5.38351707988916e-15)) + Volume*pow(fs,3)*(-4.76991513499346e-20*fs + 5.00346713698171e-13) + pow(fs,3)*(4.76991513499346e-20*fs - 5.00346713698171e-13)) + Volume*pow(fs,2)*(-5.05730339185222e-13*fs - 1.16162215422261e-12) + pow(fs,2)*(5.05730339185222e-13*fs + 1.16162215422261e-12);

    b1 = Fuzz*(Fuzz*(Volume*pow(fs,3)*(-1.43097454049804e-19*fs - 5.38351707988916e-15) + pow(fs,3)*(1.43097454049804e-19*fs + 5.38351707988916e-15)) + Volume*pow(fs,3)*(1.43097454049804e-19*fs - 5.00346713698171e-13) + pow(fs,3)*(-1.43097454049804e-19*fs + 5.00346713698171e-13)) + Volume*pow(fs,2)*(5.05730339185222e-13*fs - 1.16162215422261e-12) + pow(fs,2)*(-5.05730339185222e-13*fs + 1.16162215422261e-12);

    b2 = Fuzz*(Fuzz*(Volume*pow(fs,3)*(9.53983026998693e-20*fs - 1.07670341597783e-14) + pow(fs,3)*(-9.53983026998693e-20*fs + 1.07670341597783e-14)) + Volume*pow(fs,3)*(-9.53983026998693e-20*fs - 1.00069342739634e-12) + pow(fs,3)*(9.53983026998693e-20*fs + 1.00069342739634e-12)) + Volume*pow(fs,2)*(1.01146067837044e-12*fs + 2.32324430844522e-12) + pow(fs,2)*(-1.01146067837044e-12*fs - 2.32324430844522e-12);

    b3 = Fuzz*(Fuzz*(Volume*pow(fs,3)*(9.53983026998693e-20*fs + 1.07670341597783e-14) + pow(fs,3)*(-9.53983026998693e-20*fs - 1.07670341597783e-14)) + Volume*pow(fs,3)*(-9.53983026998693e-20*fs + 1.00069342739634e-12) + pow(fs,3)*(9.53983026998693e-20*fs - 1.00069342739634e-12)) + Volume*pow(fs,2)*(-1.01146067837044e-12*fs + 2.32324430844522e-12) + pow(fs,2)*(1.01146067837044e-12*fs - 2.32324430844522e-12);

    b4 = Fuzz*(Fuzz*(Volume*pow(fs,3)*(-1.43097454049804e-19*fs + 5.38351707988916e-15) + pow(fs,3)*(1.43097454049804e-19*fs - 5.38351707988916e-15)) + Volume*pow(fs,3)*(1.43097454049804e-19*fs + 5.00346713698171e-13) + pow(fs,3)*(-1.43097454049804e-19*fs - 5.00346713698171e-13)) + Volume*pow(fs,2)*(-5.05730339185222e-13*fs - 1.16162215422261e-12) + pow(fs,2)*(5.05730339185222e-13*fs + 1.16162215422261e-12);

    b5 = Fuzz*(Fuzz*(Volume*pow(fs,3)*(4.76991513499346e-20*fs - 5.38351707988916e-15) + pow(fs,3)*(-4.76991513499346e-20*fs + 5.38351707988916e-15)) + Volume*pow(fs,3)*(-4.76991513499346e-20*fs - 5.00346713698171e-13) + pow(fs,3)*(4.76991513499346e-20*fs + 5.00346713698171e-13)) + Volume*pow(fs,2)*(5.05730339185222e-13*fs - 1.16162215422261e-12) + pow(fs,2)*(-5.05730339185222e-13*fs + 1.16162215422261e-12);

    a0 = Fuzz*(Fuzz*fs*(fs*(fs*(fs*(-3.73292075290073e-29*fs - 1.05633134620746e-20) - 3.11506369039915e-14) - 2.30719916990074e-11) - 1.07493164710329e-9) + fs*(fs*(fs*(fs*(3.73292075290073e-29*fs + 1.01643277726662e-20) + 2.91602352831988e-14) + 2.29636966370042e-11) + 1.07449105454163e-9)) + fs*(fs*(fs*(3.98985774247549e-22*fs + 1.99042653510896e-15) + 1.83615604104971e-13) + 5.31230624730483e-11) + 2.44402781742033e-9;

    a1 = Fuzz*(Fuzz*fs*(fs*(fs*(fs*(1.86646037645036e-28*fs + 3.16899403862238e-20) + 3.11506369039915e-14) - 2.30719916990074e-11) - 3.22479494130986e-9) + fs*(fs*(fs*(fs*(-1.86646037645036e-28*fs - 3.04929833179984e-20) - 2.91602352831988e-14) + 2.29636966370042e-11) + 3.22347316362488e-9)) + fs*(fs*(fs*(-1.19695732274265e-21*fs - 1.99042653510896e-15) + 1.83615604104971e-13) + 1.59369187419145e-10) + 1.22201390871017e-8;

    a2 = Fuzz*(Fuzz*fs*(fs*(fs*(fs*(-3.73292075290073e-28*fs - 2.11266269241492e-20) + 6.2301273807983e-14) + 4.61439833980148e-11) - 2.14986329420657e-9) + fs*(fs*(fs*(fs*(3.73292075290073e-28*fs + 2.03286555453323e-20) - 5.83204705663976e-14) - 4.59273932740084e-11) + 2.14898210908325e-9)) + fs*(fs*(fs*(7.97971548495099e-22*fs - 3.98085307021793e-15) - 3.67231208209942e-13) + 1.06246124946097e-10) + 2.44402781742033e-8;

    a3 = Fuzz*(Fuzz*fs*(fs*(fs*(fs*(3.73292075290073e-28*fs - 2.11266269241492e-20) - 6.2301273807983e-14) + 4.61439833980148e-11) + 2.14986329420657e-9) + fs*(fs*(fs*(fs*(-3.73292075290073e-28*fs + 2.03286555453323e-20) + 5.83204705663976e-14) - 4.59273932740084e-11) - 2.14898210908325e-9)) + fs*(fs*(fs*(7.97971548495099e-22*fs + 3.98085307021793e-15) - 3.67231208209942e-13) - 1.06246124946097e-10) + 2.44402781742033e-8;

    a4 = Fuzz*(Fuzz*fs*(fs*(fs*(fs*(-1.86646037645036e-28*fs + 3.16899403862238e-20) - 3.11506369039915e-14) - 2.30719916990074e-11) + 3.22479494130986e-9) + fs*(fs*(fs*(fs*(1.86646037645036e-28*fs - 3.04929833179984e-20) + 2.91602352831988e-14) + 2.29636966370042e-11) - 3.22347316362488e-9)) + fs*(fs*(fs*(-1.19695732274265e-21*fs + 1.99042653510896e-15) + 1.83615604104971e-13) - 1.59369187419145e-10) + 1.22201390871017e-8;

    a5 = Fuzz*(Fuzz*fs*(fs*(fs*(fs*(3.73292075290073e-29*fs - 1.05633134620746e-20) + 3.11506369039915e-14) - 2.30719916990074e-11) + 1.07493164710329e-9) + fs*(fs*(fs*(fs*(-3.73292075290073e-29*fs + 1.01643277726662e-20) - 2.91602352831988e-14) + 2.29636966370042e-11) - 1.07449105454163e-9)) + fs*(fs*(fs*(3.98985774247549e-22*fs - 1.99042653510896e-15) + 1.83615604104971e-13) - 5.31230624730483e-11) + 2.44402781742033e-9;
};