• Dynamics Overview
• Envelope Detector 4
• Envelope Detector 3
• Envelope Detector 2
• Envelope Detector 1

00   /**********************************************************************
01   Copyright (c) 2016 Mark C. Erickson
02  
03   Permission is hereby granted, free of charge, to any person obtaining
04   a copy of this software and associated documentation files (the
05   "Software"), to deal in the Software without restriction, including
06   without limitation the rights to use, copy, modify, merge, publish,
07   distribute, sublicense, and/or sell copies of the Software, and to
08   permit persons to whom the Software is furnished to do so, subject to
09   the following conditions:
10  
11   The above copyright notice and this permission notice shall be included
12   in all copies or substantial portions of the Software.
13  
14   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
15   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
16   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
17   IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
18   CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
19   TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
20   SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
21  
22   Based on:
23   http://www.musicdsp.org/showone.php?id=136
24  
25   **********************************************************************/
26  

     Disclaimer...

27   desc:Envelope Detector 4, v1.0.0
28  
29  
30   slider1:0<0,1,1{OFF,ON}>HP
31   slider2:100<200,10000,1>Frequency
32   slider14:100<3,1000,1>Attack (us)
33   slider15:100<3,1500,1>Release (ms)
34  
35  
36   @init
37   x = 0;
38   x1 = 0;
39   x2 = 0;
40   y = 0;
41   y1 = 0;
42   y2 = 0;
43   d = sqrt(2);
44  
45   ga = gr = 1;
46   e = 0;
47  
48  
49   @slider
50   ga = exp(-2/(srate*slider14/1000000));
51   gr = exp(-2/(srate*slider15/1000));
52  
53   slider1 == 1 ? (
54   slider2 > 199 ? (
55   w = 2.0 * $pi * slider2 / srate;
56   beta = 0.5 * (( 1.0 - d / 2.0 * sin(w) ) / ( 1.0 + d / 2.0 * sin(w) ));
57   gamma = ( 0.5 + beta ) * cos(w);
58   alpha = ( 0.5 + beta - gamma ) / 4.0;
59   );
60   );
61  
62   @sample
63   a = spl0;
64   b = spl1;
65  
66   a < 0 ? i = -a : i = a;
67   b < 0 ? j = -b : j = b;
68   j > i ? i = j : i = i; // find max
69   i > e ? (
70   e = ga * (e - i) + i;
71   )
72   🙁
73   e = gr * (e - i) + i;
74   );
75  
76   slider1 == 1 ? (
77   x = e*2 - 1;
78   y = 2.0 * ( alpha * ( x + 2.0 * x1 + x2 ) + gamma * y1 - beta * y2 );
79   x2 = x1;
80   x1 = x;
81   y2 = y1;
82   y1 = y;
83   e = (y + 1) / 2;
84   );
85  
86   gDB = abs(20 * log10(e));
87  
88   e < 0.00000000001 ? e = 0 : e = e;
89  
90   spl0 = e;
91   spl1 = e;
92  

     Graphics...

94   @gfx 100 70
95   gfx_x=gfx_y=5;
96   gfx_r=0.7;
97   gfx_g=1;
98   gfx_b=0.1;
99   gfx_a=1;
100   gfx_drawchar($'E');
101   gfx_drawchar($'N');
102   gfx_drawchar($'V');
103   gfx_drawchar($' ');
104   gfx_drawchar($'4');
105   gfx_drawchar($':');
106   gfx_drawchar($' ');
107   gfx_drawchar($'-');
108   gfx_drawnumber(gDB,1);
109  
110   gfx_x=gfx_y=25;
111   gfx_rect(5, 25, gDB*10, 25);

00   /**********************************************************************
01   Copyright (c) 2016 Mark C. Erickson
02  
03   Permission is hereby granted, free of charge, to any person obtaining
04   a copy of this software and associated documentation files (the
05   "Software"), to deal in the Software without restriction, including
06   without limitation the rights to use, copy, modify, merge, publish,
07   distribute, sublicense, and/or sell copies of the Software, and to
08   permit persons to whom the Software is furnished to do so, subject to
09   the following conditions:
10  
11   The above copyright notice and this permission notice shall be included
12   in all copies or substantial portions of the Software.
13  
14   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
15   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
16   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
17   IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
18   CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
19   TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
20   SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
21  
22   Based on the MDA Dynamics VST plug-in:
23   http://mda.smartelectronix.com
24  
25   **********************************************************************/
26  

     Disclaimer...

27   desc:Envelope Detector 3, v1.0.0
28  
29   slider1:0<0,1,1{OFF,ON}>HP
30   slider2:100<200,10000,1>Frequency
31   slider14:100<3,1571,1>Attack
32   slider15:100<3,1571,1>Release
33  
34  
35   @init
36   x = 0;
37   x1 = 0;
38   x2 = 0;
39   y = 0;
40   y1 = 0;
41   y2 = 0;
42   d = sqrt(2);
43  
44  
45   @slider
46   att = 1 - pow(10, -301030.1 / (slider14*srate));
47   rel = 1 - pow(10, -301.0301 / (slider15*srate));
48  
49   slider1 == 1 ? (
50   slider2 > 199 ? (
51   w = 2.0 * $pi * slider2 / srate;
52   beta = 0.5 * (( 1.0 - d / 2.0 * sin(w) ) / ( 1.0 + d / 2.0 * sin(w) ));
53   gamma = ( 0.5 + beta ) * cos(w);
54   alpha = ( 0.5 + beta - gamma ) / 4.0;
55   );
56   );
57  
58   @sample
59   e = env;
60   re = ( 1 - rel );
61   at = att;
62  
63   a = spl0;
64   b = spl1;
65  
66   a < 0 ? i = -a : i = a;
67   b < 0 ? j = -b : j = b;
68   j > i ? i = j : i = i; // find max
69  
70   i > e ? e = e + at * (i - e) : e = e * re; // envelope
71  
72   slider1 == 1 ? (
73   x = e*2 - 1;
74   y = 2.0 * ( alpha * ( x + 2.0 * x1 + x2 ) + gamma * y1 - beta * y2 );
75   x2 = x1;
76   x1 = x;
77   y2 = y1;
78   y1 = y;
79   e = (y + 1) / 2;
80   );
81  
82   gDB = abs(20 * log10(e));
83  
84   e < 0.00000000001 ? env = 0 : env = e;
85  
86   spl0 = e;
87   spl1 = e;
88  

     Graphics...

90   @gfx 100 70
91   gfx_x=gfx_y=5;
92   gfx_r=0.7;
93   gfx_g=1;
94   gfx_b=0.1;
95   gfx_a=1;
96   gfx_drawchar($'E');
97   gfx_drawchar($'N');
98   gfx_drawchar($'V');
99   gfx_drawchar($' ');
100   gfx_drawchar($'3');
101   gfx_drawchar($':');
102   gfx_drawchar($' ');
103   gfx_drawchar($'-');
104   gfx_drawnumber(gDB,1);
105  
106   gfx_x=gfx_y=25;
107   gfx_rect(5, 25, gDB*10, 25);

00   /**********************************************************************
01   Copyright (c) 2016 Mark C. Erickson
02  
03   Permission is hereby granted, free of charge, to any person obtaining
04   a copy of this software and associated documentation files (the
05   "Software"), to deal in the Software without restriction, including
06   without limitation the rights to use, copy, modify, merge, publish,
07   distribute, sublicense, and/or sell copies of the Software, and to
08   permit persons to whom the Software is furnished to do so, subject to
09   the following conditions:
10  
11   The above copyright notice and this permission notice shall be included
12   in all copies or substantial portions of the Software.
13  
14   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
15   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
16   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
17   IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
18   CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
19   TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
20   SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
21  
22   Based on:
23   http://www.musicdsp.org/showone.php?id=97
24  
25   **********************************************************************/
26  

     Disclaimer...

27   desc:Envelope Detector 2, v1.0.0
28  
29  
30   slider1:0<0,1,1{OFF,ON}>HP
31   slider2:100<200,10000,1>Frequency
32   slider14:100<3,1000,1>Attack (us)
33   slider15:100<3,1500,1>Release (ms)
34  
35  
36   @init
37   x = 0;
38   x1 = 0;
39   x2 = 0;
40   y = 0;
41   y1 = 0;
42   y2 = 0;
43   d = sqrt(2);
44  
45   ga = gr = 1;
46   e = 0;
47  
48  
49   @slider
50   ga = exp(-1/(srate*slider14/1000000));
51   gr = exp(-1/(srate*slider15/1000));
52  
53   slider1 == 1 ? (
54   slider2 > 199 ? (
55   w = 2.0 * $pi * slider2 / srate;
56   beta = 0.5 * (( 1.0 - d / 2.0 * sin(w) ) / ( 1.0 + d / 2.0 * sin(w) ));
57   gamma = ( 0.5 + beta ) * cos(w);
58   alpha = ( 0.5 + beta - gamma ) / 4.0;
59   );
60   );
61  
62   @sample
63   a = spl0;
64   b = spl1;
65  
66   a < 0 ? i = -a : i = a;
67   b < 0 ? j = -b : j = b;
68   j > i ? i = j : i = i; // find max
69   e < i ? (
70   e *= ga;
71   e += (1-ga)*i;
72   )
73   🙁
74   e *= gr;
75   e += (1-gr)*i;
76   );
77  
78   slider1 == 1 ? (
79   x = e*2 - 1;
80   y = 2.0 * ( alpha * ( x + 2.0 * x1 + x2 ) + gamma * y1 - beta * y2 );
81   x2 = x1;
82   x1 = x;
83   y2 = y1;
84   y1 = y;
85   e = (y + 1) / 2;
86   );
87  
88   gDB = abs(20 * log10(e));
89  
90   e < 0.00000000001 ? e = 0 : e = e;
91  
92   spl0 = e;
93   spl1 = e;
94  

     Graphics...

96   @gfx 100 70
97   gfx_x=gfx_y=5;
98   gfx_r=0.7;
99   gfx_g=1;
100   gfx_b=0.1;
101   gfx_a=1;
102   gfx_drawchar($'E');
103   gfx_drawchar($'N');
104   gfx_drawchar($'V');
105   gfx_drawchar($' ');
106   gfx_drawchar($'2');
107   gfx_drawchar($':');
108   gfx_drawchar($' ');
109   gfx_drawchar($'-');
110   gfx_drawnumber(gDB,1);
111  
112   gfx_x=gfx_y=25;
113   gfx_rect(5, 25, gDB*10, 25);