fixed timing issues

app.js

@@ -7,10 +7,12 @@ var port = (process.env.PORT || 5000);
 var bpm = 120;
 var stepPos = 0;
 
+var noteSpeedVal = 4; // quarternote
+
 var metronome = null;
 metronome = setInterval(function(){ 
                 io.sockets.emit('metronome', getStepPos());
-              }, (60000 / bpm)/4);
+              }, (60000 / bpm)/noteSpeedVal);
 
 
 http.listen(port, function() {
@@ -55,7 +57,7 @@ function generateMetronome(newBpm, oldMetronome){
   
   return setInterval(function(){ 
                 io.sockets.emit('metronome', getStepPos());
-              }, (60000 / newBpm)/4);
+              }, (60000 / newBpm)/noteSpeedVal);
 
 
 }

public/client.js

@@ -18,6 +18,7 @@ $(function(){
 
     // metronome
     iosocket.on('metronome', function(serverStepPos){
+        console.log('tick');
         stepPos = serverStepPos;
         advanceStep(stepPos);
         playExternalSound();