diff --git a/src/audio/_build.py b/src/audio/_build.py
index 63d670e2..f5a7051b 100755
--- a/src/audio/_build.py
+++ b/src/audio/_build.py
@@ -1,5 +1,6 @@
 #!/usr/bin/python
 
+import audioop
 import wave
 import os
 import glob
@@ -9,6 +10,11 @@ import math
 silenceDuration = 0.05  # Seconds of silence between merged files
 outfile = "sprite1.wav"  # Output file. Will be saved in the path below.
 
+# Map containing volume adjustments for some of the files.
+AUDIO_FACTORS = {
+    'end1.wav': 0.5,
+}
+
 def main(folder="./files"):
 
     currentTime = 0
@@ -18,7 +24,7 @@ def main(folder="./files"):
     output = wave.open(outfile, 'wb')
     
     # Loop through files in folder and append to outfile
-    for i, infile in enumerate(glob.glob(os.path.join(folder, '*.wav'))):
+    for i, infile in enumerate(sorted(glob.glob(os.path.join(folder, '*.wav')))):
     
         # Open file and get info
         w = wave.open(infile, 'rb')
@@ -32,7 +38,11 @@ def main(folder="./files"):
             silenceFrames = "".join(wave.struct.pack('h', item) for item in silenceData)
 
         # Output sound + silence to file
-        output.writeframes(w.readframes(w.getnframes()))
+        samples = w.readframes(w.getnframes())
+        factor = AUDIO_FACTORS.get(os.path.basename(infile), None)
+        if factor is not None:
+            samples = audioop.mul(samples, w.getsampwidth(), factor)
+        output.writeframes(samples)
         output.writeframes(silenceFrames)
         w.close()
 
diff --git a/src/audio/sprite1.mp3 b/src/audio/sprite1.mp3
index 45be868f..d965a27e 100644
Binary files a/src/audio/sprite1.mp3 and b/src/audio/sprite1.mp3 differ
diff --git a/src/audio/sprite1.ogg b/src/audio/sprite1.ogg
index 7ff04fd0..4a814feb 100644
Binary files a/src/audio/sprite1.ogg and b/src/audio/sprite1.ogg differ
diff --git a/src/audio/sprite1.wav b/src/audio/sprite1.wav
index 863336ff..d073f3e8 100644
Binary files a/src/audio/sprite1.wav and b/src/audio/sprite1.wav differ
diff --git a/static/js/controllers/uicontroller.js b/static/js/controllers/uicontroller.js
index 595dbd2c..36a9db8e 100644
--- a/static/js/controllers/uicontroller.js
+++ b/static/js/controllers/uicontroller.js
@@ -103,29 +103,37 @@ define(['jquery', 'underscore', 'bigscreen', 'moment', 'sjcl', 'modernizr', 'web
 			urls: ['sounds/sprite1.ogg', 'sounds/sprite1.mp3'],
 			sprite: {
 				"connect1": [
-				0,
-				5179],
+					0,
+					5179
+				],
 				"end1": [
-				12892,
-				6199],
+					5228,
+					6199
+				],
 				"entry1": [
-				8387,
-				3000],
+					11476,
+					3000
+				],
 				"leaving1": [
-				5228,
-				2126],
+					14526,
+					2126
+				],
 				"message1": [
-				19140,
-				816],
+					16701,
+					816
+				],
 				"question1": [
-				20006,
-				3313],
+					17567,
+					3313
+				],
 				"ringtone1": [
-				7403,
-				935],
+					20929,
+					935
+				],
 				"whistle1": [
-				11437,
-				1405]
+					21913,
+					1405
+				]
 			}
 		}, null, {
 			"ring": "whistle1",
diff --git a/static/sounds/sprite1.mp3 b/static/sounds/sprite1.mp3
index 45be868f..d965a27e 100644
Binary files a/static/sounds/sprite1.mp3 and b/static/sounds/sprite1.mp3 differ
diff --git a/static/sounds/sprite1.ogg b/static/sounds/sprite1.ogg
index 7ff04fd0..4a814feb 100644
Binary files a/static/sounds/sprite1.ogg and b/static/sounds/sprite1.ogg differ