diff --git a/app.ts b/app.ts
index 1e8a9e7..7e2856f 100644
--- a/app.ts
+++ b/app.ts
@@ -1,10 +1,6 @@
 import * as Tone from 'tone';
-import {
-    sopranoTones, altoTones, tenorTones, bassTones,
-    extractPitchset, 
-} from "./src/toneGeneration.js";
-
-const pitchsets: string[][] = [sopranoTones, altoTones, tenorTones, bassTones];
+import { pitchsets } from "./src/toneGeneration.js";
+import { extractPitchset } from './src/harmonyUtil.js';
 
 // initialize four synth voices
 const soprano = new Tone.Synth().toDestination();
@@ -31,7 +27,7 @@ export const soundChord = (pitches: string[]) => {
 
 // initial test: generate a single, random chord
 export const fullRandomChord = () => {
-    let pitches: string[];
+    let pitches: string[] = [];
     for (let voice of pitchsets) {
         // finds a random index, excluding any which may already exist in the array
         let index: number;
diff --git a/index.html b/index.html
index 5562843..c99b8c0 100644
--- a/index.html
+++ b/index.html
@@ -118,9 +118,10 @@
         <!-- Tone.js library -->
         <script type="module" src="https://unpkg.com/tone@14.7.77/build/Tone.js"></script>
         <!-- internal scripts -->
-        <script type="module" src="./built/src/inputHandling.js"></script>
+        <script type="module" src="./built/app.js"></script>
         <script type="module" src="./built/src/toneGeneration.js"></script>
+        <script type="module" src="./built/src/harmonyUtil.js"></script>
+        <script type="module" src="./built/src/inputHandling.js"></script>
         <script type="module" src="./built/src/styleUtils.js"></script>
-        <script type="module" src="app.js"></script>
     </body>
 </html>
\ No newline at end of file
diff --git a/src/audioUtils.ts b/src/audioUtils.ts
new file mode 100644
index 0000000..325e69d
--- /dev/null
+++ b/src/audioUtils.ts
@@ -0,0 +1,34 @@
+import { evaluateVector, pitchsets } from "./toneGeneration";
+import { extractPitchset, findVector } from "./harmonyUtil";
+import { soundChord } from '../app';
+
+export const fullRandomChord = () => {
+    let pitches: string[];
+    for (let voice of pitchsets) {
+        // finds a random index, excluding any which may already exist in the array
+        let index: number;
+        
+        do {
+            index = Math.floor(Math.random() * 100) % voice.length;
+        } while (pitches.includes(voice[index]));
+
+        pitches.push(voice[index]);
+        console.log(voice[index]);
+    }
+
+    for (let i = 0; i < pitches.length; i++) {
+        if (pitches[i] === pitches[i+1]) {
+            console.log("CAUGHT");
+        }
+    }
+
+    soundChord(pitches);
+    let pitchValues: number[] = extractPitchset(pitches);
+    pitchValues = findVector(pitchValues);
+
+    let evaluated = evaluateVector(pitchValues);
+
+    console.log(pitches);
+    console.log(evaluated);
+    return evaluated;
+}
\ No newline at end of file
diff --git a/src/harmonyUtil.ts b/src/harmonyUtil.ts
index d8d1c77..e5b7ae1 100644
--- a/src/harmonyUtil.ts
+++ b/src/harmonyUtil.ts
@@ -1,5 +1,3 @@
-import { extractPitchset } from "./toneGeneration.js";
-
 // interval definitions:
 export interface IntervalDef {
     number: string
@@ -16,6 +14,8 @@ export const IntervalDefNames = {
     // ... all intervals beyond this invert to one of the previous intervals
 }
 
+export const musicalPitches = ['A', "Bb", "B", "C", "C#", "D", "D#", "E", "F", "F#", "G", "G#"];
+
 // helper functions
 const transposePitches = (pitches: number[], interval: number) => {
     let transposed = [];
@@ -23,7 +23,27 @@ const transposePitches = (pitches: number[], interval: number) => {
     return transposed;
 }
 
-const findVector = (pitches: number[]) => {
+export const extractPitchset = (pitches: string[]) => {
+    // 1) determine pitch set from given array of pitches
+    let pitchset: number[] = [];
+
+    for (let each of pitches) {
+        // filters numbers from above tones
+        const str = each;
+        const regex = /[0-9]/g;
+        const withoutNums = str.replace(regex, '');
+        const pitchNumber = musicalPitches.indexOf(withoutNums);
+
+        // ... so that they may be mapped onto numbers corresponding to the chromatic scale
+        pitchset.push(pitchNumber);
+    }
+
+    // these are sorted from lowest to highest index (something like an interval vector)
+    pitchset.sort((a,b) => a - b);
+    return pitchset;
+}
+
+export const findVector = (pitches: number[]) => {
     let sorted = pitches.sort((x,y) => x - y);
     // sorted = sorted.filter((num, idx) => {
     //     return sorted.indexOf(num) === idx;
@@ -88,4 +108,3 @@ console.log('');
  * references @interface IntervalDef to select from @constant IntervalDefNames
  * @returns an array of duples, each containing a number and an entry from IntervalDef
  */
-
diff --git a/src/toneGeneration.ts b/src/toneGeneration.ts
index 25a7de8..76a2cb7 100644
--- a/src/toneGeneration.ts
+++ b/src/toneGeneration.ts
@@ -1,43 +1,32 @@
-import * as harmUtil from './harmonyUtil';
+import { findVector, IntervalDefNames, musicalPitches } from './harmonyUtil';
 
 // we start with a selection of pitches that generally work okay together
-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"];
+const sopranoTones = ["B5", "A5", "G5", "F#5", "F5", "E5", "D5", "C5", "B4", "Bb4", "A4", "G4", "F#4", "F4", "E4"];
+const altoTones = ["E5", "D5", "C5", "B4", "Bb4", "A4", "G4", "F#4", "F4", "E4", "D4", "C4", "B3", "Bb3", "A3", "G3"];
+const tenorTones = ["G4", "F#4", "F4", "E4", "D4", "C4", "B3", "Bb3", "A3", "G3", "F3", "E3", "D3", "C3"];
+const bassTones = ["C2", "D2", "E2", "F2", "G2", "A2", "Bb2", "B2", "C3", "D3", "E3", "F3", "G3"];
 
-// now we define some rules to allow for the program to follow so it can some basic tenets of music theory
-// we're going to include all pitches, so that it can use semitone-based pitch logic.
-// this is focused on base-12, something computers understand quite well
-const musicalPitches = ['A', "Bb", "B", "C", "C#", "D", "D#", "E", "F", "F#", "G", "G#"];
+export const pitchsets: string[][] = [sopranoTones, altoTones, tenorTones, bassTones];
 
-export const extractPitchset = (pitches: string[]) => {
-    // 1) determine pitch set from given array of pitches
-    let pitchset: number[] = [];
+/**
+ * now we define some rules to allow for the program to follow so it can some basic tenets of music theory
+ * we include all pitches, so that it can use semitone-based pitch logic focused on base-12
+ * 
+ * some basic rules:
+ * no tritones
+ * no minor 2nds or major 7ths
+*/
 
-    for (let each of pitches) {
-        // filters numbers from above tones
-        const str = each;
-        const regex = /[0-9]/g;
-        const withoutNums = str.replace(regex, '');
-        const pitchNumber = musicalPitches.indexOf(withoutNums);
+export const evaluateVector = (vector: number[]): boolean => {
+    let result: boolean;
 
-        // ... so that they may be mapped onto numbers corresponding to the chromatic scale
-        pitchset.push(pitchNumber);
+    for (let x of vector) {
+        if (x === 1 || x === 6) {
+            result = false;
+            return;
+        } else {
+            result = true;
+        }
     }
-
-    // these are sorted from lowest to highest index (something like an interval vector)
-    pitchset.sort((a,b) => a - b);
-    console.log(pitchset);
-
-    return pitchset;
-}
-
-// no tritones
-// no minor 2nds or major 7ths
-
-const evaluateVector = (vector: number[]): boolean => {
-    
-
-    return true;
+    return result;
 }