diff --git a/app.js b/app.js
index bbb610c..aab2115 100644
--- a/app.js
+++ b/app.js
@@ -1,6 +1,3 @@
-import { pitchsets } from "./src/harmonyUtil.js";
-import { extractPitchset } from "./src/vector_logic/extractPitchset.js";
-
 // initialize four synth voices
 const soprano = new Tone.Synth().toDestination();
 const alto = new Tone.Synth().toDestination();
diff --git a/index.html b/index.html
index 3a9dfbe..09e22de 100644
--- a/index.html
+++ b/index.html
@@ -124,10 +124,5 @@
         <script type="module" src="./src/harmonyUtil.js"></script>
         <script type="module" src="./src/audioUtil.js"></script>
         <script type="module" src="./app.js"></script>
-        <!-- vector logic scripts -->
-        <script type="module" src="./src/vector_logic/evaluateVector.js"></script>
-        <script type="module" src="./src/vector_logic/extractPitchset.js"></script>
-        <script type="module" src="./src/vector_logic/findVector.js"></script>
-        <script type="module" src="./src/vector_logic/numbersToPitches.js"></script>
     </body>
 </html>
\ No newline at end of file
diff --git a/src/audioUtil.js b/src/audioUtil.js
index 97feba5..39c74c4 100644
--- a/src/audioUtil.js
+++ b/src/audioUtil.js
@@ -1,6 +1,7 @@
 import { soundChord } from "../app.js";
-import { getRandomPitches } from "./harmonyUtil.js";
+import { getRandomPitches } from "./vector_logic/getRandomPitches.js";
 import { extractPitchset } from "./vector_logic/extractPitchset.js";
+import { getProceduralPitches } from "./vector_logic/getProceduralPitches.js";
 
 // initial test: generate a single, random chord
 export const fullRandomChord = () => {
@@ -11,6 +12,10 @@ export const fullRandomChord = () => {
     return pitchset;
 }
 
-export const evaluatedChord = () => {
-    return fullRandomChord();
+export const evaluatedChord = (prevPitches = ["C3", "G3", "C4", "G4"]) => {
+    let pitches = getProceduralPitches(prevPitches);
+    soundChord(pitches);
+    let pitchset = extractPitchset(pitches);
+
+    return pitchset;
 }
\ No newline at end of file
diff --git a/src/harmonyUtil.js b/src/harmonyUtil.js
index bd01f6b..696320b 100644
--- a/src/harmonyUtil.js
+++ b/src/harmonyUtil.js
@@ -1,13 +1,9 @@
-import { extractPitchset } from "./vector_logic/extractPitchset.js";
-import { evaluateVector } from "./vector_logic/evaluateVector.js";
-import { extractPitchName } from "./vector_logic/extractPitchName.js";
-
 export const sopranoTones = ["B5", "A5", "G5", "F#5", "F5", "E5", "D5", "C5", "B4", "Bb4", "A4", "G4", "F#4", "F4", "E4"];
 export const altoTones = ["E5", "D5", "C5", "B4", "Bb4", "A4", "G4", "F#4", "F4", "E4", "D4", "C4", "B3", "Bb3", "A3", "G3"];
 export const tenorTones = ["G4", "F#4", "F4", "E4", "D4", "C4", "B3", "Bb3", "A3", "G3", "F3", "E3", "D3", "C3"];
 export const bassTones = ["C2", "D2", "E2", "F2", "G2", "A2", "Bb2", "B2", "C3", "D3", "E3", "F3", "G3"];
 
-export const pitchsets = [sopranoTones, altoTones, tenorTones, bassTones];
+export const pitchsets = [bassTones, tenorTones, altoTones, sopranoTones];
 
 export const musicalPitches = ['A', "Bb", "B", "C", "C#", "D", "D#", "E", "F", "F#", "G", "G#"];
 
@@ -29,45 +25,3 @@ const transposePitches = (pitchNames, interval) => {
     pitchNames.forEach(pitch => transposed.push((pitch + interval) % 12));
     return transposed;
 }
-
-export const getRandomPitches = () => {
-    // pitches stored in Tone.js string format
-    let pitches = [];
-    let formattedPitches = [];
-    
-    for (let voice of pitchsets) {
-        // finds a random index, excluding any which may already exist in the array
-        let index;
-        let pitch;
-        let formattedPitch;
-
-        // loops until four distinct chord members are received
-        while (formattedPitches.length <= pitchsets.indexOf(voice)) {
-            index = Math.floor(Math.random() * 100) % voice.length;
-            pitch = voice[index];
-            
-            formattedPitch = extractPitchName(pitch);
-            if (!formattedPitches.includes(formattedPitch)) {
-                formattedPitches.push(formattedPitch);
-                pitches.push(pitch);
-            }
-        }
-    }
-
-    console.log(formattedPitches);
-    console.log(pitches);
-    return pitches;
-}
-
-// an additional method based on the structure of the method above,
-// but taking principles of music theory into account.
-export const getProceduralPitches = () => {
-    let pitches = [];
-    let formattedPitches = [];
-
-    for (let voice of pitchsets) {
-        let index;
-        let pitch;
-        let formattedPitch;
-    }
-}
diff --git a/src/vector_logic/evaluateVector.js b/src/vector_logic/evaluateVector.js
index 035c4b2..db32ff6 100644
--- a/src/vector_logic/evaluateVector.js
+++ b/src/vector_logic/evaluateVector.js
@@ -1,4 +1,4 @@
-import { getRandomPitches } from "../harmonyUtil.js";
+import { getRandomPitches } from './getRandomPitches.js';
 import { extractPitchset } from "./extractPitchset.js";
 import { findVector } from "./findVector.js";
 
diff --git a/src/vector_logic/getProceduralPitches.js b/src/vector_logic/getProceduralPitches.js
new file mode 100644
index 0000000..0a542f1
--- /dev/null
+++ b/src/vector_logic/getProceduralPitches.js
@@ -0,0 +1,34 @@
+import { pitchsets } from "../harmonyUtil.js";
+import { extractPitchName } from "./extractPitchName.js";
+
+// an additional method based on the structure of getRandomPitches,
+// but taking some principles of music theory into account.
+export const getProceduralPitches = (prevPitches) => {
+    // prevPitches is passed in to ensure there is no linear dissonance within voices
+    let pitches = [];
+    let formattedPitches = [];
+    
+    for (let voice of pitchsets) {
+        let index;
+        let formattedPitch;
+        
+        while (pitches.length <= pitchsets.indexOf(voice)) {
+            // the first section of this while loop is more free.
+            index = Math.floor(Math.random() * 100) % voice.length;
+            formattedPitch = extractPitchName(voice[index]);
+
+            // this initial condition will apply only to the bass voice,
+            if (!pitches.length) {
+                pitches.push(voice[index]);
+            } else {
+                // now we need some repeating logic for the remaining four voices
+                while (pitches.length !== (pitchsets.indexOf(voice) + 1)) {
+                    pitches.push(pitchsets.indexOf(voice));
+                }
+            }
+        }
+    }
+
+    console.log(pitches);
+    return pitches;
+}
diff --git a/src/vector_logic/getRandomPitches.js b/src/vector_logic/getRandomPitches.js
new file mode 100644
index 0000000..a041b44
--- /dev/null
+++ b/src/vector_logic/getRandomPitches.js
@@ -0,0 +1,29 @@
+import { pitchsets } from "../harmonyUtil.js";
+import { extractPitchName } from "./extractPitchName.js";
+
+export const getRandomPitches = () => {
+    // pitches stored in Tone.js string format
+    let pitches = [];
+    let formattedPitches = [];
+    
+    for (let voice of pitchsets) {
+        // finds a random index, excluding any which may already exist in the array
+        let index;
+        let formattedPitch;
+
+        // loops until four distinct chord members are received
+        while (formattedPitches.length <= pitchsets.indexOf(voice)) {
+            index = Math.floor(Math.random() * 100) % voice.length;
+
+            formattedPitch = extractPitchName(voice[index]);
+            if (!formattedPitches.includes(formattedPitch)) {
+                formattedPitches.push(formattedPitch);
+                pitches.push(voice[index]);
+            }
+        }
+    }
+
+    console.log(formattedPitches);
+    console.log(pitches);
+    return pitches;
+}