Fix to Alarm Distortion

Tested with new alarm, it sounded distorted. Looked at implementation of other sounds (news skill), and decided to try with MP3. Changed to using MP3 instead. Everything works properly now, tested on multiple devices.

mycroft/configuration/defaults/defaults.ini

@@ -72,7 +72,7 @@ url_rss = "http://www.npr.org/rss/podcast.php?id=500005"
 time_format = 12h # Options are 12h and 24h
 
 [AlarmSkill]
-filename = alarm.wav
+filename = alarm.mp3
 max_delay = 600  # in seconds
 repeat_time = 20  # in seconds
 extended_delay = 60  # in seconds

mycroft/skills/alarm/__init__.py

@@ -24,7 +24,7 @@ from os.path import dirname, join
 
 from adapt.intent import IntentBuilder
 from mycroft.skills.scheduled_skills import ScheduledCRUDSkill
-from mycroft.util import play_wav
+from mycroft.util import play_mp3
 
 __author__ = 'jdorleans'
 
@@ -75,7 +75,7 @@ class AlarmSkill(ScheduledCRUDSkill):
                 delay = self.__calculate_delay(self.max_delay)
 
                 while self.alarm_on and datetime.now() < delay:
-                    play_wav(self.file_path)
+                    play_mp3(self.file_path)
                     time.sleep(1)
                     self.speak_dialog('alarm.stop')
                     time.sleep(self.repeat_time + 2)