Fix iphone silent switch webaudio mute (#2686)

fix iphone silent switch mode when using webaudio so it continues playing audio * Update CHANGES.md
katspaugh · Mar 1, 2023 · 320f114 · 320f114
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diff --git a/CHANGES.md b/CHANGES.md
@@ -5,6 +5,7 @@ wavesurfer.js changelog
 ------------------
 - Regions plugin:
   - Improved delta calculation (resize end) (#2641)
+- Fix iphone silent switch webaudio mute (#2667)
 
 6.4.0 (05.11.2022)
 ------------------

diff --git a/src/util/silence-mode.js b/src/util/silence-mode.js
@@ -10,6 +10,13 @@
  * @since 5.2.0
  */
 export default function ignoreSilenceMode() {
+    // Set webaudio context with 1 second silent audio 44100 bit rate buffer to allow playing audio even if silent switch is on the device
+    const silentAC = new AudioContext();
+    const silentBS = silentAC.createBufferSource();
+    silentBS.buffer = silentAC.createBuffer(1, 1, 44100);
+    silentBS.connect(silentAC.destination);
+    silentBS.start();
+
     // Set the src to a short bit of url encoded as a silent mp3
     // NOTE The silence MP3 must be high quality, when web audio sounds are played
     // in parallel the web audio sound is mixed to match the bitrate of the html sound