state management

index.html

@@ -113,12 +113,14 @@
                 <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>
+                <button id="next-chord">Get next chord (console)</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="./src/pitch_generation/sonorityList.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>

src/audioUtil.js

@@ -14,7 +14,7 @@ export const fullRandomChord = () => {
 
 export const evaluatedChord = (prevPitches = ["C3", "G3", "C4", "G4"]) => {
     let pitches = getProceduralPitches(prevPitches);
-    soundChord(pitches);
+    if (pitches) soundChord(pitches);
     let pitchset = extractPitchset(pitches);
 
     return pitchset;

src/inputHandling.js

@@ -1,5 +1,6 @@
 import { audioTest } from '../app.js';
 import { fullRandomChord, evaluatedChord } from './audioUtil.js';
+import { sonorities, getNextSonority } from './pitch_generation/sonorityList.js';
 
 // slider variables referring to DOM
 export const sopranoVol = document.getElementById('soprano-vol');
@@ -76,3 +77,6 @@ randChord.onclick = fullRandomChord;
 
 const evalChord = document.getElementById('eval-chord');
 evalChord.onclick = evaluatedChord;
+
+const nextChord = document.getElementById('next-chord');
+nextChord.onclick = getNextSonority;

src/pitch_generation/getProceduralPitches.js

@@ -2,11 +2,13 @@ import { pitchsets, musicalPitches } from "../harmonyUtil.js";
 import { extractPitchName } from "../data_conversions/extractPitchName.js";
 import { getRandomIndex } from "./getRandomPitches.js";
 import { melodicGeneration } from './melodicGeneration.js';
+import { sonorityList } from "./sonorityList.js";
 
-// iterator to prevent stack overflow
+// variables to handle recursive logic
 let callCount = 0;
 
 export const getProceduralPitches = () => {
+    let result;
     callCount++;
 
     if (callCount >= 10) {
@@ -53,15 +55,17 @@ export const getProceduralPitches = () => {
     // if a dissonance is found, the function is called recursively, and its value returned
     if (isDissonant) {
         let newPitches = getProceduralPitches();
-        return newPitches;
+        result = newPitches;
     // otherwise, the original value itself is returned
     } else {
         console.log(`call count: ${callCount}`);
         callCount = 0;
-        console.log(pitches);
 
-        let { isMelodic, nextPitches } = melodicGeneration(pitches);
-
-        if (nextPitches) return nextPitches;
+        let newValue = melodicGeneration(pitches);
+        sonorityList(pitches, newValue);
+        
+        result = newValue;
     }
+
+    if (result) return result;
 }

src/pitch_generation/melodicGeneration.js

@@ -6,7 +6,10 @@ import { musicalPitches, pitchsets } from '../harmonyUtil.js';
 // reads the pitch of the previous sonority and determines appropriate melodic movement for the soprano
 // returns a boolean which triggers a recursive call if the interval received is out of expected values
 
+let callCount = 0;
 export const melodicGeneration = (prevPitches) => {
+    let result;
+
     // direction: boolean; true refers to ascending motion; false refers to descending motion
     let direction;
     let isMelodic = true;
@@ -84,9 +87,12 @@ export const melodicGeneration = (prevPitches) => {
     }
 
     if (!isMelodic) {
-        let newMelodicPitches = melodicGeneration(prevPitches);
-        return newMelodicPitches;
+        callCount++;
+        result = melodicGeneration(prevPitches);
     } else {
-        return newPitches;
+        callCount = 0;
+        result = newPitches;
     }
+
+    return result;
 }

src/pitch_generation/sonorityList.js

@@ -0,0 +1,13 @@
+export const sonorities = [];
+
+export const sonorityList = (result) => {
+    if (!sonorities.includes(result)) sonorities.push(result);
+    console.log(sonorities);
+
+    return sonorities;
+}
+
+export const getNextSonority = () => {
+    console.log(sonorities);
+    return sonorities;
+}