Mobile Safari might need full URLs

https://stackoverflow.com/questions/24881807/html5-audio-on-safari-ios

js/smarter-ui.js

@@ -10,9 +10,9 @@ VEHICLE_BUS = 3;
 
 AUDIO = {};
 // Wav files are also available.
-AUDIO[VEHICLE_CAR] = 'audio/car_marimba.mp3';
-AUDIO[VEHICLE_TRUCK] = 'audio/truck_glockenspiel.mp3';
-AUDIO[VEHICLE_BUS] = 'audio/bus_mallets.mp3';
+AUDIO[VEHICLE_CAR] = 'https://smarter-data.tt.utu.fi/audio/car_marimba.mp3';
+AUDIO[VEHICLE_TRUCK] = 'https://smarter-data.tt.utu.fi/audio/truck_glockenspiel.mp3';
+AUDIO[VEHICLE_BUS] = 'https://smarter-data.tt.utu.fi/audio/bus_mallets.mp3';
 
 SEP = ',';
 SERVER = 'wss://smarter-data.tt.utu.fi/ws/';