New directory tree, with preprocessor/ inside interpretor/.

[Faustine.git] / interpretor / faust-0.9.47mr3 / tools / faust2pd / examples / synth / compressor.dsp

diff --git a/interpretor/faust-0.9.47mr3/tools/faust2pd/examples/synth/compressor.dsp b/interpretor/faust-0.9.47mr3/tools/faust2pd/examples/synth/compressor.dsp
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index ff03d1a..0000000
--- a/interpretor/faust-0.9.47mr3/tools/faust2pd/examples/synth/compressor.dsp
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@@ -1,75 +0,0 @@
-
-/* Compressor unit. */
-
-declare name "compressor -- compressor/limiter unit";
-declare author "Albert Graef";
-declare version "1.0";
-
-import("music.lib");
-
-/* Controls. */
-
-// partition the controls into these three groups
-comp_group(x)  = hgroup("1-compression", x);
-env_group(x)   = vgroup("2-envelop", x);
-gain_group(x)  = vgroup("3-gain", x);
-
-// compressor controls: ratio, threshold and knee size
-ratio          = comp_group(nentry("ratio", 2, 1, 20, 0.1));
-threshold      = comp_group(nentry("threshold", -20, -96, 10, 0.1));
-knee           = comp_group(nentry("knee", 3, 0, 20, 0.1));
-
-// attack and release controls; clamped to a minimum of 1 sample
-attack         = env_group(hslider("attack", 0.002, 0, 1, 0.001)) : max(1/SR);
-release                = env_group(hslider("release", 0.5, 0, 10, 0.01)) : max(1/SR);
-
-// gain controls: make-up gain, compression gain meter
-makeup_gain    = gain_group(hslider("makeup gain", 0, -96, 96, 0.1));
-gain(x)                = attach(x, x : gain_group(hbargraph("gain", -96, 0)));
-
-/* Envelop detector. This is basically the same as in amp.dsp. */
-
-t              = 0.1;
-g              = exp(-1/(SR*t));
-env            = abs : *(1-g) : + ~ *(g);
-rms            = sqr : *(1-g) : + ~ *(g) : sqrt;
-sqr(x)         = x*x;
-
-/* Compute the envelop of a stereo signal. Replace env with rms if you want to
-   use the RMS value instead. */
-
-env2(x,y)      = max(env(x),env(y));
-
-/* Compute the compression factor for the current input level. The gain is
-   always 0 dB if we're below the reduced threshold, threshold-knee. Beyond
-   the real threshold value the level is scaled by 1/ratio. Between these two
-   extremes we return a convex combination of those factors. This is also
-   known as "soft-knee" compression: the compression kicks in gradually at
-   threshold-knee and reaches its full value at threshold. For special
-   effects, you can also achieve old-school "hard-knee" compression by setting
-   the knee value to zero. Also note that, before computing the gain, the
-   input level is first smoothed out using a 1 pole IIR to prevent clicks when
-   the input level changes abruptly. The attack and release times of this
-   filter are configured with the corresponding envelop controls of the
-   compressor. */
-
-compress(env)  = level*(1-r)/r
-with {
-       // the (filtered) input level above the threshold
-       level   = env : h ~ _ : linear2db : (_-threshold+knee) : max(0)
-       with {
-               h(x,y)  = f*x+(1-f)*y with { f = (x<y)*ga+(x>=y)*gr; };
-               ga      = exp(-1/(SR*attack));
-               gr      = exp(-1/(SR*release));
-       };
-       // the knee factor, clamped to 0..1; we add a small perturbation in
-       // the denominator to prevent infinities and nan when knee<<1
-       p       = level/(knee+eps) : max(0) : min(1) with { eps = 0.001; };
-       // the actual compression ratio
-       r       = 1-p+p*ratio;
-};
-
-process(x,y)   = (g*x,g*y)
-with {
-       g       = env2(x,y) : compress : gain : +(makeup_gain) : db2linear;
-};