diff --git a/node-server/assets/script.js b/node-server/assets/script.js
index e641262..fb46bd3 100644
--- a/node-server/assets/script.js
+++ b/node-server/assets/script.js
@@ -51,8 +51,8 @@ socket.on('position', (position) => {
         isPlaying = true;
       }
       // SENSIBILITÉ : le facteur diviseur est plus grand → plus doux 
-      let playbackSpeed = 0.5 + speed / 1000;
-      playbackSpeed = Math.min(Math.max(playbackSpeed, 0.5), 1.0); // plage limitée à x1 max
+      let playbackSpeed = 0.5 + speed / 800;
+      playbackSpeed = Math.min(Math.max(playbackSpeed, 0.5), 1.2); // plage limitée à x1 max
       audio.playbackRate = playbackSpeed;
     }
   }