Remove waveshaper from volume effect

the waveshaper node is implemented incorrectly on Mac Safari (https://bugs.webkit.org/show_bug.cgi?id=129333) and causes extreme distortion of the sound

Author: ericrosenbaum

src/lib/audio/effects/volume-effect.js

@@ -14,16 +14,8 @@ class VolumeEffect {
         this.gain.gain.setValueAtTime(volume, endSeconds);
         this.gain.gain.exponentialRampToValueAtTime(1.0, endSeconds + this.rampLength);
 
-        // Use a waveshaper node to prevent sample values from exceeding -1 or 1.
-        // Without this, gain can cause samples to exceed this range, then they
-        // are clipped on save, and the sound is distorted on load.
-        this.waveShaper = this.audioContext.createWaveShaper();
-        this.waveShaper.curve = new Float32Array([-1, 1]);
-        this.waveShaper.oversample = 'none';
-
         this.input.connect(this.gain);
-        this.gain.connect(this.waveShaper);
-        this.waveShaper.connect(this.output);
+        this.gain.connect(this.output);
     }
 }