Reduce volume of "end1" sound by 50%.

Any adjustments are done during building, so we can keep the source files
unmodified. With that, updated the build script to sort the list of sounds
in the sprite by name so further changes are consistent.

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()
 

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",