diff --git a/main/templates/course_detail.html b/main/templates/course_detail.html
index b9314ee..e79c313 100644
--- a/main/templates/course_detail.html
+++ b/main/templates/course_detail.html
@@ -128,44 +128,18 @@ socket.onmessage = function(e) {
     } catch {
         return;
     }
+
     // Vérifie le format des données reçues
     let rowData;
-    function formatHMS(seconds) {
-        // Copie la logique du templatetag temps_format
-        if (seconds === undefined || seconds === null || seconds === "") return "--:--:--";
-        let total_seconds = 0;
-        if (typeof seconds === 'string' && seconds.includes(':')) {
-            // déjà formaté
-            return seconds;
-        }
-        if (!isNaN(Number(seconds))) {
-            total_seconds = Math.floor(Number(seconds));
-        } else {
-            return "--:--:--";
-        }
-        let h = Math.floor(total_seconds / 3600);
-        let m = Math.floor((total_seconds % 3600) / 60);
-        let s = total_seconds % 60;
-        return (h < 10 ? '0' : '') + h + 'h' + (m < 10 ? '0' : '') + m + 'm' + (s < 10 ? '0' : '') + s + 's';
-    }
-    if (Array.isArray(data)) {
-        // Si la ligne reçue n'a pas 5 colonnes, on complète avec des vides
-        rowData = data.slice(0, 5);
-        while (rowData.length < 5) rowData.push('');
-        // Si le temps est en secondes, on le formate
-        if (rowData.length > 4 && /^\d+$/.test(rowData[4])) {
-            rowData[4] = formatHMS(rowData[4]);
-        }
-    } else if (typeof data === 'object' && data !== null) {
+
+    if (typeof data === 'object' && data !== null) {
         // Transforme l'objet en tableau dans l'ordre attendu
-        let temps = data.temps;
-        if (/^\d+$/.test(temps)) temps = formatHMS(temps);
         rowData = [
             data.rang,
             data.nom || (data.coureur && data.coureur.nom),
             data.prenom || (data.coureur && data.coureur.prenom),
             data.classe || (data.coureur && data.coureur.classe),
-            temps
+            data.temps
         ];
     } else {
         // Format inconnu, ignore
diff --git a/main/views.py b/main/views.py
index 8fe5323..05e68d9 100644
--- a/main/views.py
+++ b/main/views.py
@@ -22,14 +22,13 @@ from PIL import Image
 
 
 def seconds_to_hms(delta: timedelta) -> str:
-	"""Format a timedelta as H:MM:SS (handles days too)."""
 	if delta is None:
 		return ''
 	total = int(delta.total_seconds())
 	hours = total // 3600
 	minutes = (total % 3600) // 60
 	seconds = total % 60
-	return f"{hours}:{minutes:02d}:{seconds:02d}"
+	return f"{hours}h{minutes:02d}m{seconds:02d}s"
 
 @login_required
 def main_view(request):
@@ -141,10 +140,6 @@ def course_detail_view(request, course_id):
 			is_finished = True
 		return redirect('course_detail', course_id=course.id)
 
-	if request.headers.get('x-requested-with') == 'XMLHttpRequest':
-		from django.template.loader import render_to_string
-		tbody = render_to_string('arrivees_tbody.html', {'arrivees': arrivees})
-		return HttpResponse(tbody)
 	return render(request, 'course_detail.html', {
 		'title': 'Course : '+course.nom+" ("+str(course.date)+")",
 		'course': course,
@@ -152,6 +147,7 @@ def course_detail_view(request, course_id):
 		'is_started': is_started,
 		'is_finished': is_finished
 	})
+
 @login_required
 def scan_view(request):
 	courses = Course.objects.filter(owner=request.user, depart__isnull=False, fin__isnull=True)
diff --git a/static/mp3/error.mp3 b/static/mp3/error.mp3
new file mode 100644
index 0000000..396da7e
Binary files /dev/null and b/static/mp3/error.mp3 differ
diff --git a/static/mp3/ok.mp3 b/static/mp3/ok.mp3
new file mode 100644
index 0000000..cce6abc
Binary files /dev/null and b/static/mp3/ok.mp3 differ