diff --git a/cmd/audio-player/main.js b/cmd/audio-player/main.js
index 00d0eab6..1d893bb3 100644
--- a/cmd/audio-player/main.js
+++ b/cmd/audio-player/main.js
@@ -23,35 +23,36 @@ LICENSE
 */
 
 window.onload = function () {
+	document.getElementById('input').addEventListener('change', processData)
+}
 
-    document.getElementById('input').addEventListener('change', function () {
-        const input = event.target.files[0]
-        const reader = new FileReader()
+function processData() {
+	const input = event.target.files[0]
+	const reader = new FileReader()
 
-        reader.onload = event => {
-            bytes = new Uint8Array(event.target.result)
+	reader.onload = event => {
+		bytes = new Uint8Array(event.target.result)
 
-            // decode adpcm to pcm
-            var decoded = decode(Array.from(bytes))
+		// decode adpcm to pcm
+		var decoded = decode(Array.from(bytes))
 
-            // convert raw pcm to wav
-            var wav = pcmToWav(decoded, 48000, 1, 16);
+		// convert raw pcm to wav
+		var wav = pcmToWav(decoded, 48000, 1, 16);
 
-            // play wav data in player
-            const blob = new Blob([Uint8Array.from(wav)], {
-                type: 'audio/wav'
-            });
-            const url = URL.createObjectURL(blob);
+		// play wav data in player
+		const blob = new Blob([Uint8Array.from(wav)], {
+			type: 'audio/wav'
+		});
+		const url = URL.createObjectURL(blob);
 
-            const audio = document.getElementById('audio');
-            const source = document.getElementById('source');
+		const audio = document.getElementById('audio');
+		const source = document.getElementById('source');
 
-            source.src = url;
-            audio.load();
-            audio.play();
-        }
-        reader.onerror = error => reject(error)
-        reader.readAsArrayBuffer(input)
+		source.src = url;
+		audio.load();
+		audio.play();
+	}
+	reader.onerror = error => reject(error)
+	reader.readAsArrayBuffer(input)
 
-    })
 }
\ No newline at end of file