Update mixer.ts

ConnorChristie#5 (comment)

Unfortunately it seems this repo is no longer maintained. I was able to fork the repo (to our company repo) - you will be able to fix the CPU issue by doing the following here: https://github.com/ConnorChristie/Audio-Mixer/blob/master/src/mixer.ts#L82

Replace this bit:

clearImmediate(this._timer)
this._timer = setImmediate(this._read.bind(this));
with

clearTimeout(this._timer)
this._timer = setTimeout(this._read.bind(this), 0);
I dont know what kind of impact it would have in terms of realtime processing. But for our use-case it works and all 2000 unit tests are still passing after this change. But CPU basically went down to 0 :)

src/mixer.ts

@@ -80,7 +80,7 @@ export class Mixer extends Readable {
             this.push(mixedBuffer);
         } else if(this.needReadable) {
             clearImmediate(this._timer)
-            this._timer = setImmediate(this._read.bind(this));
+            this._timer = setTimeout(this._read.bind(this), 0);
         }
 
         this.clearBuffers();