app.js

@@ -1,10 +1,3 @@
-import {
-    sopranoTones, altoTones, tenorTones, bassTones,
-    extractPitchset, 
-} from "./js/toneGeneration.js";
-
-const pitchsets = [sopranoTones, altoTones, tenorTones, bassTones];
-
 // initialize four synth voices
 const soprano = new Tone.Synth().toDestination();
 const alto = new Tone.Synth().toDestination();
@@ -20,47 +13,18 @@ export const audioTest = () => {
 }
 
 // allows a chord to be generated with input from another function
-export const soundChord = (pitches) => {
+// pitchNames: array of strings
-    const [s,a,t,b] = pitches;
+export const soundChord = (pitchNames) => {
+    const [s,a,t,b] = pitchNames;
     soprano.triggerAttackRelease(s, "8n");
     alto.triggerAttackRelease(a, "8n");
     tenor.triggerAttackRelease(t, "8n");
     bass.triggerAttackRelease(b, "8n");
 }
 
-// initial test: generate a single, random chord
-export const fullRandomChord = () => {
-    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]);
-        console.log(voice[index]);
-    }
-
-    for (let i = 0; i < pitches.length; i++) {
-        if (pitches[i] === pitches[i+1]) {
-            console.log("CAUGHT");
-        }
-    }
-
-    soundChord(pitches);
-    extractPitchset(pitches);
-}
-
 // 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 +34,3 @@ loop.probability = 0.8;
 transportStart.onclick = () => {
     Tone.Transport.start();
 }
-

index.html

@@ -112,15 +112,17 @@
                 <button id="mute-all">Mute all oscillators</button>
                 <button id="reset-lfos">Reset LFO values to default</button>
                 <button id="rand-chord">Full random chord</button>
+                <button id="eval-chord">Evaluated chord</button>
             </div>
         </main>
 
         <!-- 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="./src/styleUtils.js"></script>
-        <script type="module" src="./js/toneGeneration.js"></script>
+        <script type="module" src="./src/inputHandling.js"></script>
-        <script type="module" src="./js/styleUtils.js"></script>
+        <script type="module" src="./src/harmonyUtil.js"></script>
-        <script type="module" src="app.js"></script>
+        <script type="module" src="./src/audioUtil.js"></script>
+        <script type="module" src="./app.js"></script>
     </body>
 </html>

js/harmonyUtil.js

@@ -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);

js/toneGeneration.js

@@ -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

src/audioUtil.js

@@ -0,0 +1,21 @@
+import { soundChord } from "../app.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 = () => {
+    let pitches = getRandomPitches();
+    soundChord(pitches);
+    let pitchset = extractPitchset(pitches);
+
+    return pitchset;
+}
+
+export const evaluatedChord = (prevPitches = ["C3", "G3", "C4", "G4"]) => {
+    let pitches = getProceduralPitches(prevPitches);
+    soundChord(pitches);
+    let pitchset = extractPitchset(pitches);
+
+    return pitchset;
+}

src/harmonyUtil.js

@@ -0,0 +1,27 @@
+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 = [bassTones, tenorTones, altoTones, sopranoTones];
+
+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;
+}

src/inputHandling.js

@@ -1,4 +1,5 @@
-import { audioTest, fullRandomChord } from '../app.js';
+import { audioTest } from '../app.js';
+import { fullRandomChord, evaluatedChord } from './audioUtil.js';
 
 // slider variables referring to DOM
 export const sopranoVol = document.getElementById('soprano-vol');
@@ -64,3 +65,6 @@ synthButton.onclick = audioTest;
 
 const randChord = document.getElementById('rand-chord');
 randChord.onclick = fullRandomChord;
+
+const evalChord = document.getElementById('eval-chord');
+evalChord.onclick = evaluatedChord;

src/vector_logic/evaluateVector.js

@@ -0,0 +1,21 @@
+import { getRandomPitches } from './getRandomPitches.js';
+import { extractPitchset } from "./extractPitchset.js";
+import { findVector } from "./findVector.js";
+
+export const evaluateVector = (vector) => {
+    return ((vector.includes(1) || vector.includes(6)));
+}
+
+export const rejectDissonance = (pitchset) => {
+    const vector = findVector(pitchset);
+
+    // returns the pitchset and its vector if evaluateVector returns true,
+    if (evaluateVector(vector)) return vector;
+
+    // and recursively calls the function otherwise.
+    if (!evaluateVector(vector)) {
+        let newPitches = getRandomPitches();
+        let newPitchset = extractPitchset(newPitches);
+        rejectDissonance(newPitchset);
+    };
+}

src/vector_logic/extractPitchName.js

@@ -0,0 +1,2 @@
+const regex = /[A-Gb#]/g;
+export const extractPitchName = (tonePitchName) => tonePitchName.match(regex).join('');

src/vector_logic/extractPitchset.js

@@ -0,0 +1,22 @@
+import { musicalPitches } from '../harmonyUtil.js';
+import { extractPitchName } from './extractPitchName.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 withoutNums = extractPitchName(str);
+        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;
+}

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;
+}

src/vector_logic/getProceduralPitches.js

@@ -0,0 +1,54 @@
+import { pitchsets, musicalPitches } from "../harmonyUtil.js";
+import { extractPitchName } from "./extractPitchName.js";
+import { getRandomIndex } from "./getRandomPitches.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 = getRandomIndex(voice);
+            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)) {
+                    index = getRandomIndex(voice);
+                    pitches.push(voice[index]);
+
+                    
+                    for (let i = 0; i < pitches.length; i++) {
+                        let numVals = [];
+
+                        for (let j = i; j < i + 2; j++) {
+                            console.log(pitches[j]);
+                            let extracted = extractPitchName(pitches[j]);
+                            numVals.push(musicalPitches.indexOf(extracted) + 1);
+                        }
+
+                        let difference = Math.abs(numVals.reduce((x,y) => x - y));
+                        if (difference === 1 || difference === 6) {
+                            pitches.pop();
+                        } else {
+                            continue;
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    console.log(pitches);
+    return pitches;
+}

src/vector_logic/getRandomPitches.js

@@ -0,0 +1,32 @@
+import { pitchsets } from "../harmonyUtil.js";
+import { extractPitchName } from "./extractPitchName.js";
+
+// helper function for assigning a random index for a given voice's pitchset
+export const getRandomIndex = (voice) => Math.floor(Math.random() * 100) % voice.length;
+
+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 = getRandomIndex(voice);
+
+            formattedPitch = extractPitchName(voice[index]);
+            if (!formattedPitches.includes(formattedPitch)) {
+                formattedPitches.push(formattedPitch);
+                pitches.push(voice[index]);
+            }
+        }
+    }
+
+    console.log(formattedPitches);
+    console.log(pitches);
+    return pitches;
+}

src/vector_logic/helper.js

@@ -0,0 +1,80 @@
+import { pitchsets, musicalPitches } from '../harmonyUtil.js';
+import { extractPitchName } from './extractPitchName.js';
+import { getRandomIndex } from './getRandomPitches.js';
+
+const iteratePitchsets = () => {
+    let pitches = [];
+    let result = [];
+
+    const tryNewPitch = () => {
+        result = [];
+
+        for (let voice of pitchsets) {
+            let idx = getRandomIndex(voice);
+            let pitchNum = musicalPitches.indexOf(extractPitchName(voice[idx]));
+    
+            pitches.push([pitchNum, voice[idx]]);
+        }
+
+        console.log(pitches);
+
+        for (let i = 0; i < pitches.length; i++) {
+            for (let j = i; j < pitches.length; j++) {
+                let difference = Math.abs(pitches[i][0] - pitches[j][0]);
+                if (difference === 1 || difference === 6) {
+                    result.push(["BAD", [i, j], pitches[i], pitches[j]]);
+                } else {
+                    result.push(["GOOD", [i, j], pitches[i], pitches[j]]);
+                }
+            }
+        }
+        console.log(result);
+    }
+
+    tryNewPitch();
+
+    for (let entry in result) {
+        if (entry[0] === "BAD") {
+            iteratePitchsets();
+        }
+    }
+
+    console.log(pitches);
+}
+
+iteratePitchsets();
+
+
+
+function twoPointIteration() {
+    let caught = false;
+    let data = [1,2,3,4,5,6];
+
+    for (let i = 0; i < data.length; i++) {
+        console.log(data[i]);
+        for (let j = 0; j < data.length; j++) {
+            if (data[i] === data[j]) continue;
+
+            let difference = Math.abs(data[j] - data[i]);
+
+            if (difference === 3) {
+                difference = "caught: 3";
+            }
+
+            console.log([difference, [data[i], data[j]]]);
+        }
+
+        console.log('next');
+    }
+
+    return caught;
+}
+
+function selfReferentialPointer() {
+    for (let i = 0; i < 5; i++) {
+        console.log(`i: ${i}`);
+        for (let j = i; j < i+2; j++) {
+            console.log(`jjjjjjj: ${j % 3}`);
+        }
+    }
+}