X-Git-Url: https://scm.cri.ensmp.fr/git/Faustine.git/blobdiff_plain/1059e1cc0c2ecfa237406949aa26155b6a5b9154..66f23d4fabf89ad09adbd4dfc15ac6b5b2b7da83:/interpretor/preprocessor/faust-0.9.47mr3/tools/faust2pd/examples/synth/amp.dsp

diff --git a/interpretor/preprocessor/faust-0.9.47mr3/tools/faust2pd/examples/synth/amp.dsp b/interpretor/preprocessor/faust-0.9.47mr3/tools/faust2pd/examples/synth/amp.dsp
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--- a/interpretor/preprocessor/faust-0.9.47mr3/tools/faust2pd/examples/synth/amp.dsp
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-
-/* Stereo amplifier stage with bass, treble, gain and balance controls and a
-   dB meter. */
-
-declare name "amp -- stereo amplifier stage";
-declare author "Albert Graef";
-declare version "1.0";
-
-import("math.lib");
-import("music.lib");
-
-/* Fixed bass and treble frequencies. You might want to tune these for your
-   setup. */
-
-bass_freq	= 300;
-treble_freq	= 1200;
-
-/* Bass and treble gain controls in dB. The range of +/-20 corresponds to a
-   boost/cut factor of 10. */
-
-bass_gain	= nentry("bass", 0, -20, 20, 0.1);
-treble_gain	= nentry("treble", 0, -20, 20, 0.1);
-
-/* Gain and balance controls. */
-
-gain		= db2linear(nentry("gain", 0, -96, 96, 0.1));
-bal		= hslider("balance", 0, -1, 1, 0.001);
-
-/* Balance a stereo signal by attenuating the left channel if balance is on
-   the right and vice versa. I found that a linear control works best here. */
-
-balance		= *(1-max(0,bal)), *(1-max(0,0-bal));
-
-/* Generic biquad filter. */
-
-filter(b0,b1,b2,a0,a1,a2)	= f : (+ ~ g)
-with {
-	f(x)	= (b0/a0)*x+(b1/a0)*x'+(b2/a0)*x'';
-	g(y)	= 0-(a1/a0)*y-(a2/a0)*y';
-};
-
-/* Low and high shelf filters, straight from Robert Bristow-Johnson's "Audio
-   EQ Cookbook", see http://www.musicdsp.org/files/Audio-EQ-Cookbook.txt. f0
-   is the shelf midpoint frequency, g the desired gain in dB. S is the shelf
-   slope parameter, we always set that to 1 here. */
-
-low_shelf(f0,g)		= filter(b0,b1,b2,a0,a1,a2)
-with {
-	S  = 1;
-	A  = pow(10,g/40);
-	w0 = 2*PI*f0/SR;
-	alpha = sin(w0)/2 * sqrt( (A + 1/A)*(1/S - 1) + 2 );
-
-	b0 =    A*( (A+1) - (A-1)*cos(w0) + 2*sqrt(A)*alpha );
-	b1 =  2*A*( (A-1) - (A+1)*cos(w0)                   );
-	b2 =    A*( (A+1) - (A-1)*cos(w0) - 2*sqrt(A)*alpha );
-	a0 =        (A+1) + (A-1)*cos(w0) + 2*sqrt(A)*alpha;
-	a1 =   -2*( (A-1) + (A+1)*cos(w0)                   );
-	a2 =        (A+1) + (A-1)*cos(w0) - 2*sqrt(A)*alpha;
-};
-
-high_shelf(f0,g)	= filter(b0,b1,b2,a0,a1,a2)
-with {
-	S  = 1;
-	A  = pow(10,g/40);
-	w0 = 2*PI*f0/SR;
-	alpha = sin(w0)/2 * sqrt( (A + 1/A)*(1/S - 1) + 2 );
-
-	b0 =    A*( (A+1) + (A-1)*cos(w0) + 2*sqrt(A)*alpha );
-	b1 = -2*A*( (A-1) + (A+1)*cos(w0)                   );
-	b2 =    A*( (A+1) + (A-1)*cos(w0) - 2*sqrt(A)*alpha );
-	a0 =        (A+1) - (A-1)*cos(w0) + 2*sqrt(A)*alpha;
-	a1 =    2*( (A-1) - (A+1)*cos(w0)                   );
-	a2 =        (A+1) - (A-1)*cos(w0) - 2*sqrt(A)*alpha;
-};
-
-/* The tone control. We simply run a low and a high shelf in series here. */
-
-tone		= low_shelf(bass_freq,bass_gain)
-		: high_shelf(treble_freq,treble_gain);
-
-/* Envelop follower. This is basically a 1 pole LP with configurable attack/
-   release time. The result is converted to dB. You have to set the desired
-   attack/release time in seconds using the t parameter below. */
-
-t		= 0.1;			// attack/release time in seconds
-g		= exp(-1/(SR*t));	// corresponding gain factor
-
-env		= abs : *(1-g) : + ~ *(g) : linear2db;
-
-/* Use this if you want the RMS instead. Note that this doesn't really
-   calculate an RMS value (you'd need an FIR for that), but in practice our
-   simple 1 pole IIR filter works just as well. */
-
-rms		= sqr : *(1-g) : + ~ *(g) : sqrt : linear2db;
-sqr(x)		= x*x;
-
-/* The dB meters for left and right channel. These are passive controls. */
-
-left_meter(x)	= attach(x, env(x) : hbargraph("left", -96, 10));
-right_meter(x)	= attach(x, env(x) : hbargraph("right", -96, 10));
-
-/* The main program. */
-
-process		= hgroup("0-amp", hgroup("1-tone", tone, tone) :
-				  hgroup("2-gain", (_*gain, _*gain)))
-		: vgroup("3-balance", balance)
-		: vgroup("4-meter", (left_meter, right_meter));