diff --git a/src/soundtrack/optical/Library.java b/src/soundtrack/optical/Library.java
new file mode 100644
index 0000000..e144c83
--- /dev/null
+++ b/src/soundtrack/optical/Library.java
@@ -0,0 +1,114 @@
+package optical_soundtrack;
+
+import processing.sound.*;
+import processing.core.*;
+
+public class Soundtrack {
+  String TYPE = "dual variable area"; //type of soundtrack
+  int DPI = 2880; //dots/in
+  boolean POSITIVE = true;
+  float VOLUME = 1.0;
+  String pitch = "long";
+  //String filePath = "wavTones.com.unregistred.sweep_100Hz_6000Hz_-3dBFS_5s.wav";
+  String FILEPATH = "barking.wav";
+  
+  float IN      = 25.4; //mm/in
+  float FRAME_H = 7.62; //mm
+  float FRAME_W = 12.52 - 10.26;; //mm
+  
+  float DPMM = DPI / IN;
+  int FRAME_H_PIXELS = round(DPMM * FRAME_H);
+  int SAMPLE_RATE    = FRAME_H_PIXELS * 24;
+  int DEPTH          = round(DPMM * FRAME_W);
+  
+  int LINE_W        = 0;
+  float DENSITY     = 0;
+  int LEFT          = 0;
+  int FRAMES        = 0;
+  int i = 0;
+  
+  float max = 0;
+  float min = 0;
+  float compare;
+  
+  Sound s;
+  AudioSample sample;
+  float[] frameSample = new float[FRAME_H_PIXELS];
+  SoundFile soundfile;
+  
+  Soundtrack (PApplet parent, String soundtrackFile, int dpi, float volume, String type, String pitch, boolean positive ) {
+    FILEPATH = soundtrackFile;
+    TYPE = type;
+    DPI = dpi;
+    VOLUME = volume;
+    POSITIVE = positive;
+    FRAME_H = pitch == "long" ? 7.62 : 7.605;
+    
+    DPMM = DPI / IN;
+    FRAME_H_PIXELS = round(DPMM * FRAME_H);
+    SAMPLE_RATE    = FRAME_H_PIXELS * 24;
+    DEPTH          = floor(DPMM * FRAME_W);
+    
+    soundfile = new SoundFile(parent, FILEPATH);
+    soundfile.rate(SAMPLE_RATE);
+  
+    FRAMES = ceil(soundfile.frames() / FRAME_H_PIXELS);
+    
+    /*
+      println("SAMPLE RATE ");
+      println(SAMPLE_RATE);
+      println("FRAME_H");
+      println(FRAME_H_PIXELS);
+      println("DEPTH ");
+      println(DEPTH);
+      println("FRAMES");
+      println(FRAMES);
+    */
+  }
+  public void frame(int X, int Y) {
+    if (i >= FRAMES) {
+      return;
+    }
+    
+   if (POSITIVE) {
+      background(0);
+      stroke(255);
+    } else {
+      background(255);
+      stroke(0);
+    }
+    
+    soundfile.read(i * FRAME_H_PIXELS, frameSample, 0, FRAME_H_PIXELS);
+  
+    for (int y = 0; y < FRAME_H_PIXELS; y++) {
+      LINE_W = round(map(frameSample[y], min, max, 0, DEPTH * VOLUME));
+      //println();
+      if (TYPE == "unilateral") {
+        line(X + 0, Y + y, X + LINE_W, Y + y);
+      } else if (TYPE == "dual unilateral") {
+        /* TODO!!!! */
+      } else if (TYPE == "single variable area") {
+        LEFT = X + round((DEPTH - LINE_W) / 2);
+        line(LEFT, Y + y, LEFT + LINE_W, Y + y);
+      } else if (TYPE == "dual variable area") {
+        LEFT = X + round((DEPTH / 4) - (LINE_W / 4));
+        line(LEFT, Y + y, LEFT + (LINE_W / 2), Y + y);
+        line(LEFT + (DEPTH / 2), Y + y, LEFT + (DEPTH / 2) + (LINE_W / 2), Y + y);
+      } else if (TYPE == "multiple variable area" || TYPE == "maurer") {
+        LEFT = X + round((DEPTH / 16) - (LINE_W / 16));
+        for (int x = 1; x < 7; x++) {
+           line(LEFT + ((x * DEPTH) / 8), Y + y, LEFT + ((x * DEPTH) / 8) + (LINE_W / 8), Y + y);
+        }
+      } else if (TYPE == "variable density") {
+        DENSITY = map(frameSample[y], min, max, 0, 255 * VOLUME);
+        if (POSITIVE) {
+          stroke(DENSITY);
+        } else {
+          stroke(255 - DENSITY);
+        }
+        line(X + 0, Y + y, X + DEPTH, Y + y);
+      }
+    }
+    i++;
+  }
+}