added matlab

2025-08-21 07:27:52 +02:00
parent fd522e1b99
commit 64c6745c76
50 changed files with 2516 additions and 0 deletions
@@ -0,0 +1,56 @@
+function eval_adsr(Ta, Td, Vs, Tr)
+
+% eval_adsr(0.1, 0.2, 0.2, 0.2)
+
+fs = 10000;
+
+aa = 1/(Ta*fs)
+ba = (1-aa)
+a_d = 5/(Td*fs)
+a_r = 5/(Tr*fs)
+state = 0;
+s = 0;
+tol = 1E-4;
+ke = 1-exp(-1)
+n = 0;
+p = 0;
+k = 1/ke;
+kk = 0;
+s
+while (1),
+    
+    if state == 0
+        s = aa + ba*s;
+        if s >= (ke-tol)
+            state = 1;
+            k = (1-Vs)/ke;
+            kk = Vs;
+        end;
+    end;
+    if state == 1
+        s = (1-a_d)*s;
+        if s <= (tol)
+            state = 2;
+            s = 1;
+            k = Vs;
+            kk = 0;
+            p = 0;
+        end;
+    end;
+    if state == 2
+        if p >= 0.1*fs
+            state = 3;
+        end;
+        p = p + 1;
+    end;
+    if state == 3
+        s = (1-a_r)*s;
+        if s <= (tol)
+            break;
+        end;
+    end;
+    n = n + 1;
+    y(n) = k*s + kk;
+end;
+
+plot((0:n-1)/fs, 0.8-y); grid;