diff --git a/app.js b/app.js
index 75cf0c8..7ceae65 100644
--- a/app.js
+++ b/app.js
@@ -1,9 +1,5 @@
-import {
-    sopranoTones, altoTones, tenorTones, bassTones,
-    extractPitchset, 
-} from "./js/toneGeneration.js";
-
-const pitchsets = [sopranoTones, altoTones, tenorTones, bassTones];
+import { pitchsets } from "./src/harmonyUtil.js";
+import { extractPitchset } from "./src/vector_logic/extractPitchset.js";
 
 // initialize four synth voices
 const soprano = new Tone.Synth().toDestination();
@@ -20,8 +16,9 @@ export const audioTest = () => {
 }
 
 // allows a chord to be generated with input from another function
-export const soundChord = (pitches) => {
-    const [s,a,t,b] = pitches;
+// pitchNames: array of strings
+export const soundChord = (pitchNames) => {
+    const [s,a,t,b] = pitchNames;
     soprano.triggerAttackRelease(s, "8n");
     alto.triggerAttackRelease(a, "8n");
     tenor.triggerAttackRelease(t, "8n");
@@ -54,13 +51,8 @@ export const fullRandomChord = () => {
 }
 
 // set up transport
-let clock = 0;
-let slowClock = 0;
-
 const transportStart = document.getElementById('transport-start');
 
-let transport;
-
 const loop = new Tone.Loop((time) => {
     audioTest();
 }, "8n").start(0);
@@ -70,4 +62,3 @@ loop.probability = 0.8;
 transportStart.onclick = () => {
     Tone.Transport.start();
 }
-
diff --git a/index.html b/index.html
index bb9cd11..50c49fb 100644
--- a/index.html
+++ b/index.html
@@ -118,9 +118,15 @@
         <!-- Tone.js library -->
         <script type="module" src="https://unpkg.com/tone@14.7.77/build/Tone.js"></script>
         <!-- internal scripts -->
-        <script type="module" src="./js/inputHandling.js"></script>
-        <script type="module" src="./js/toneGeneration.js"></script>
-        <script type="module" src="./js/styleUtils.js"></script>
-        <script type="module" src="app.js"></script>
+        <script type="module" src="./src/styleUtils.js"></script>
+        <script type="module" src="./src/inputHandling.js"></script>
+        <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/js/harmonyUtil.js b/js/harmonyUtil.js
deleted file mode 100644
index f433593..0000000
--- a/js/harmonyUtil.js
+++ /dev/null
@@ -1,64 +0,0 @@
-import { extractPitchset } from "./toneGeneration.js";
-
-// interval definitions:
-const intervals = {
-    0: "unison",
-    1: "minor second",
-    2: "major second",
-    3: "minor third",
-    4: "major third",
-    5: "perfect fourth",
-    6: "tritone"
-    // all intervals beyond this invert to one of the previous intervals
-}
-
-// helper functions
-const transposePitches = (pitchNames, interval) => {
-    let transposed = [];
-    pitchNames.forEach(pitch => transposed.push((pitch + interval) % 12));
-    return transposed;
-}
-
-const findVector = (pitches) => {
-    let sorted = pitches.sort((x,y) => x - y);
-    // sorted = sorted.filter((num, idx) => {
-    //     return sorted.indexOf(num) === idx;
-    // });
-
-    // finds each interval and logs it as a duple
-    let intervalClasses = [];
-    for (let i = 0; i < sorted.length; i++) {
-        let j = i+1;
-
-        // does not allow out of range values in the proceeding loop
-        if (j >= sorted.length) {
-            break;
-        }
-
-        do {
-            let thing = (sorted[j] - sorted[i]) % 6
-            if (!(intervalClasses.includes(thing))) {
-                intervalClasses.push(thing);
-            }
-            j++;
-        } while (j < sorted.length);
-    }
-
-    intervalClasses = intervalClasses.sort((x,y) => x-y);
-    return intervalClasses;
-}
-
-// analysis
-let dMajor = extractPitchset(["D", "F#", "A", "D"]);
-const eMajor = transposePitches(dMajor, 2);
-console.log(eMajor);
-console.log('');
-
-let dMajVector = findVector(dMajor);
-console.log(dMajVector);
-
-let complexVector = findVector([0,3,4,7,8,11]);
-console.log(complexVector);
-
-let splitThird = findVector([0,3,4,7]);
-console.log(splitThird);
diff --git a/js/toneGeneration.js b/js/toneGeneration.js
deleted file mode 100644
index 9787eaf..0000000
--- a/js/toneGeneration.js
+++ /dev/null
@@ -1,35 +0,0 @@
-// 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"];
-
-// 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 extractPitchset = (pitches) => {
-    // 1) determine pitch set from given array of pitches
-    let pitchset = [];
-
-    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);
-    console.log(pitchset);
-
-    return pitchset;
-}
-
-// no tritones
-// no minor 2nds or major 7ths
\ No newline at end of file
diff --git a/src/audioUtil.js b/src/audioUtil.js
new file mode 100644
index 0000000..c88de0c
--- /dev/null
+++ b/src/audioUtil.js
@@ -0,0 +1,10 @@
+import { soundChord } from "../app.js";
+import { getRandomPitches } from "./harmonyUtil.js";
+
+// initial test: generate a single, random chord
+export const fullRandomChord = () => {
+    let pitches = getRandomPitches();
+
+    soundChord(pitches);
+    extractPitchset(pitches);
+}
\ No newline at end of file
diff --git a/src/harmonyUtil.js b/src/harmonyUtil.js
new file mode 100644
index 0000000..6a72c77
--- /dev/null
+++ b/src/harmonyUtil.js
@@ -0,0 +1,46 @@
+import { extractPitchset } from "./vector_logic/extractPitchset.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 musicalPitches = ['A', "Bb", "B", "C", "C#", "D", "D#", "E", "F", "F#", "G", "G#"];
+
+// interval definitions:
+export const intervalNames = {
+    0: "unison",
+    1: "minor second",
+    2: "major second",
+    3: "minor third",
+    4: "major third",
+    5: "perfect fourth",
+    6: "tritone"
+    // all intervals beyond this invert to one of the previous intervals
+}
+
+// helper functions
+const transposePitches = (pitchNames, interval) => {
+    let transposed = [];
+    pitchNames.forEach(pitch => transposed.push((pitch + interval) % 12));
+    return transposed;
+}
+
+export const getRandomPitches = () => {
+    // pitches stored in Tone.js string format
+    let pitches = [];
+    for (let voice of pitchsets) {
+        // finds a random index, excluding any which may already exist in the array
+        let index;
+        
+        do {
+            index = Math.floor(Math.random() * 100) % voice.length;
+        } while (pitches.includes(voice[index]));
+
+        pitches.push(voice[index]);
+    }
+
+    return pitches;
+}
diff --git a/js/inputHandling.js b/src/inputHandling.js
similarity index 100%
rename from js/inputHandling.js
rename to src/inputHandling.js
diff --git a/js/styleUtils.js b/src/styleUtils.js
similarity index 100%
rename from js/styleUtils.js
rename to src/styleUtils.js
diff --git a/src/vector_logic/evaluateVector.js b/src/vector_logic/evaluateVector.js
new file mode 100644
index 0000000..e69de29
diff --git a/src/vector_logic/extractPitchset.js b/src/vector_logic/extractPitchset.js
new file mode 100644
index 0000000..33b74a8
--- /dev/null
+++ b/src/vector_logic/extractPitchset.js
@@ -0,0 +1,22 @@
+import { musicalPitches } from '../harmonyUtil.js';
+
+// converts pitches in Tone.js string format to base-12 number pitchsets
+export const extractPitchset = (pitches) => {
+    // 1) determine pitch set from given array of pitches
+    let pitchset = [];
+
+    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;
+}
\ No newline at end of file
diff --git a/src/vector_logic/findVector.js b/src/vector_logic/findVector.js
new file mode 100644
index 0000000..2457b00
--- /dev/null
+++ b/src/vector_logic/findVector.js
@@ -0,0 +1,26 @@
+// takes pitches as numbers and converts them to a vector
+export const findVector = (pitches) => {
+    let sorted = pitches.sort((x,y) => x - y);
+
+    // finds each interval and logs it as a duple
+    let intervalClasses = [];
+    for (let i = 0; i < sorted.length; i++) {
+        let j = i+1;
+
+        // does not allow out of range values in the proceeding loop
+        if (j >= sorted.length) {
+            break;
+        }
+
+        do {
+            let thing = (sorted[j] - sorted[i]) % 6
+            if (!(intervalClasses.includes(thing))) {
+                intervalClasses.push(thing);
+            }
+            j++;
+        } while (j < sorted.length);
+    }
+
+    intervalClasses = intervalClasses.sort((x,y) => x-y);
+    return intervalClasses;
+}
diff --git a/src/vector_logic/numbersToPitches.js b/src/vector_logic/numbersToPitches.js
new file mode 100644
index 0000000..e69de29