New directory tree, with preprocessor/ inside interpretor/.
[Faustine.git] / interpretor / preprocessor / faust-0.9.47mr3 / tools / faust2pd / examples / synth / karplus.syn
diff --git a/interpretor/preprocessor/faust-0.9.47mr3/tools/faust2pd/examples/synth/karplus.syn b/interpretor/preprocessor/faust-0.9.47mr3/tools/faust2pd/examples/synth/karplus.syn
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+
+declare name "karplus -- Karplus-Strong string synth";
+declare author "Yann Orlarey";
+declare version "1.0";
+
+import("music.lib");
+
+// control variables
+
+// master volume and pan
+vol    = hslider("vol", -10, -96, 96, 0.1);    // dB
+pan    = hslider("pan", 0, -1, 1, 0.01);       // %
+
+// excitator and resonator parameters
+size   = hslider("samples", 512, 1, 1024, 1);  // #samples
+dtime  = hslider("decay time", 4, 0, 10, 0.01);// -60db decay time
+
+// voice parameters
+freq   = nentry("freq", 440, 20, 20000, 1);    // Hz
+gain   = nentry("gain", 1, 0, 10, 0.01);       // %
+gate   = button("gate");                       // 0/1
+bend   = hslider("pitch bend", 0, -2, 2, 0.01);// semitones
+
+/* The excitator: */
+
+upfront(x)     = (x-x') > 0.0;
+decay(n,x)     = x - (x>0)/n;
+release(n)     = + ~ decay(n);
+trigger(n)     = upfront : release(n) : >(0.0) : +(leak);
+leak           = 1.0/65536.0; // avoid denormals on Pentium
+excitator      = trigger(size);
+
+/* The resonator: */
+
+average(x)     = (x+x')/2;
+att(d,t)       = 1-1/pow(db2linear(60), d/(SR*t));
+comb(d,a)      = (+ : fdelay(4096, d-1.5)) ~ (average : *(1.0-a));
+resonator(d)   = comb(d,att(d,dtime));
+
+/* DC blocker (see http://ccrma.stanford.edu/~jos/filters/DC_Blocker.html): */
+
+dcblocker(x)   = (x-x') : (+ ~ *(0.995));
+
+/* Karplus-Strong string synthesizer: */
+
+process        = vgroup("1-excitator", noise*gain : *(gate : excitator))
+       : vgroup("2-resonator", resonator(SR/(freq*pow(2,bend/12))))
+       : dcblocker
+        : vgroup("3-master", *(db2linear(vol)) : panner((pan+1)/2));