Reimplement legacy Sound class with new audio engine

packages/dev/core/src/Audio/Interfaces/ISoundOptions.ts

@@ -40,7 +40,7 @@ export interface ISoundOptions {
      * Define the distance attenuation model the sound will follow.
      * @see https://doc.babylonjs.com/features/featuresDeepDive/audio/playingSoundsMusic#creating-a-spatial-3d-sound
      */
-    distanceModel?: string;
+    distanceModel?: "linear" | "inverse" | "exponential";
     /**
      * Defines the playback speed (1 by default)
      */

packages/dev/core/src/Audio/audioEngine.ts

@@ -1,11 +1,10 @@
-import type { Analyser } from "./analyser";
-
-import type { Nullable } from "../types";
-import { Observable } from "../Misc/observable";
-import { AbstractEngine } from "../Engines/abstractEngine";
-import type { IAudioEngine } from "./Interfaces/IAudioEngine";
 import { _WebAudioEngine } from "../AudioV2/webAudio/webAudioEngine";
 import type { _WebAudioMainBus } from "../AudioV2/webAudio/webAudioMainBus";
+import { AbstractEngine } from "../Engines/abstractEngine";
+import { Observable } from "../Misc/observable";
+import type { Nullable } from "../types";
+import type { Analyser } from "./analyser";
+import type { IAudioEngine } from "./Interfaces/IAudioEngine";
 
 // Sets the default audio engine to Babylon.js
 AbstractEngine.AudioEngineFactory = (
@@ -22,7 +21,6 @@ AbstractEngine.AudioEngineFactory = (
  * @see https://doc.babylonjs.com/features/featuresDeepDive/audio/playingSoundsMusic
  */
 export class AudioEngine implements IAudioEngine {
-    private _audioContext: Nullable<AudioContext> = null;
     private _masterGain: GainNode;
     private _tryToRun = false;
     private _useCustomUnlockedButton: boolean = false;
@@ -176,7 +174,7 @@ export class AudioEngine implements IAudioEngine {
      * This is helpful to resume play once browser policies have been satisfied.
      */
     public unlock() {
-        if (this._audioContext?.state === "running") {
+        if (this._v2._audioContext?.state === "running") {
             if (!this.unlocked) {
                 // Notify users that the audio stack is unlocked/unmuted
                 this.unlocked = true;
@@ -192,10 +190,10 @@ export class AudioEngine implements IAudioEngine {
 
     /** @internal */
     public _resumeAudioContextOnStateChange(): void {
-        this._audioContext?.addEventListener(
+        this._v2._audioContext?.addEventListener(
             "statechange",
             () => {
-                if (this.unlocked && this._audioContext?.state !== "running") {
+                if (this.unlocked && this._v2._audioContext?.state !== "running") {
                     // eslint-disable-next-line @typescript-eslint/no-floating-promises
                     this._resumeAudioContextAsync();
                 }
@@ -214,6 +212,10 @@ export class AudioEngine implements IAudioEngine {
             return Promise.resolve();
         }
 
+        if (this._v2._audioContext.state === "suspended" && !this._useCustomUnlockedButton) {
+            this._v2._unmuteUIEnabled = true;
+        }
+
         return this._v2._audioContext.resume();
     }
 
@@ -261,6 +263,7 @@ export class AudioEngine implements IAudioEngine {
 
     private async _triggerRunningStateAsync() {
         if (this._tryToRun) {
+            void this._v2._audioContext.resume();
             return;
         }
         this._tryToRun = true;