diff --git a/webpack/lib/audio-manager.js b/webpack/lib/audio-manager.js
index 685b590..a6d7b10 100644
--- a/webpack/lib/audio-manager.js
+++ b/webpack/lib/audio-manager.js
@@ -109,7 +109,9 @@ export default class AudioManager{
 		let buf32 = this.i16tof32(_buffer);
 
 		/* (2) Create source node */
-		let source = this.ctx.createBufferSource();
+		let source = this.ctx.createBufferSource({
+			playbackRate: 1.1
+		});
 
 		/* (3) Create buffer and dump data */
 		let input_buffer = this.ctx.createBuffer(1, AudioManager.BUFFER_SIZE, this.ctx.sampleRate);
@@ -120,7 +122,6 @@ export default class AudioManager{
 
 		/* (5) Connect and play audio */
 		source.connect(this.gain);
-		source.playbackRate = 1.1;
 		source.start(0);
 
 	}