"normalize audio"

src/renderer/audio/audio.js

@@ -0,0 +1,63 @@
+var CiderAudio = {
+    context : null,
+    source : null,
+    audioNodes : {
+        gainNode : null,
+        compressorNode : null,
+    },
+    init: function (cb = function () { }) {
+        //AudioOutputs.fInit = true;
+        searchInt = setInterval(function () {
+          if (document.getElementById("apple-music-player")) {
+            //AudioOutputs.eqReady = true;
+            document.getElementById("apple-music-player").crossOrigin = "anonymous";
+            CiderAudio.connectContext(document.getElementById("apple-music-player"), 0);
+    
+            cb();
+            clearInterval(searchInt);
+          }
+        }, 1000);
+    },
+    connectContext: function (mediaElem){
+        CiderAudio.context = new (window.AudioContext || window.webkitAudioContext);
+        CiderAudio.source = CiderAudio.context.createMediaElementSource(mediaElem);
+        CiderAudio.audioNodes.gainNode = CiderAudio.context.createGain()
+        CiderAudio.source.connect(CiderAudio.audioNodes.gainNode);
+        CiderAudio.audioNodes.gainNode.connect(CiderAudio.context.destination);
+        if(app.cfg.audio.normalization){
+            CiderAudio.normalizerOn()
+        }
+    },
+    normalizerOn: function (){
+        let tuna = Tuna(CiderAudio.context)
+         if (!CiderAudio.audioNodes.compressorNode){
+         CiderAudio.audioNodes.compressorNode = new tuna.Compressor({
+            threshold: -80,    //-100 to 0
+            makeupGain: 5,     //0 and up (in decibels)
+            attack: 2,         //0 to 1000
+            release: 200,      //0 to 3000
+            ratio: 8,          //1 to 20
+            knee: 0,           //0 to 40
+            automakeup: false, //true/false
+            bypass: 0
+        });
+        }
+        try{
+        CiderAudio.audioNodes.gainNode.disconnect(CiderAudio.context.destination);
+        } catch (e){}
+        CiderAudio.audioNodes.gainNode.connect(CiderAudio.audioNodes.compressorNode);
+        CiderAudio.audioNodes.compressorNode.connect(CiderAudio.context.destination);
+    },
+    normalizerOff: function (){
+        try{
+        CiderAudio.audioNodes.compressorNode.disconnect();
+        CiderAudio.audioNodes.compressorNode = null
+        } catch (e){}
+        CiderAudio.audioNodes.gainNode.connect(CiderAudio.context.destination);
+    }
+
+}
+if (app.cfg.advanced.AudioContext){
+    CiderAudio.init()
+   
+}