diff --git a/client/src/hooks/useAudioLevels.js b/client/src/hooks/useAudioLevels.js
index 267882d..bdef888 100644
--- a/client/src/hooks/useAudioLevels.js
+++ b/client/src/hooks/useAudioLevels.js
@@ -5,7 +5,7 @@
 
 import { useState, useEffect, useRef } from 'react';
 
-const WS_URL = import.meta.env.VITE_WS_AUDIO_LEVELS_URL || 'ws://localhost:3001';
+const WS_URL = import.meta.env.VITE_WS_AUDIO_LEVELS_URL || 'ws://localhost:3000';
 
 /**
  * Hook pour monitoring des niveaux audio temps réel
diff --git a/server/index.js b/server/index.js
index 07cc474..d1d2c37 100644
--- a/server/index.js
+++ b/server/index.js
@@ -12,6 +12,7 @@ import { AccessToken } from 'livekit-server-sdk';
 import adminRouter, { registerUser, addLog } from './api/admin.js';
 import configManager from './config/ConfigManager.js';
 import audioBridgeManager from './bridge/AudioBridgeManager.js';
+import AudioLevelsServer from './websocket/AudioLevelsServer.js';
 
 const __dirname = dirname(fileURLToPath(import.meta.url));
 
@@ -373,6 +374,11 @@ async function start() {
       log('info', `Groupes configurés: ${config.groups.map(g => g.name).join(', ')}`);
     });
 
+    // 2.5 Démarrer WebSocket Audio Levels (même port que l'API)
+    const audioLevelsServer = new AudioLevelsServer({ server });
+    audioLevelsServer.start();
+    log('info', `✓ WebSocket Audio Levels démarré sur ws://${SERVER_HOST}:${SERVER_PORT}`);
+
     // 3. Démarrer Audio Bridge Manager (Phase 2.5)
     log('info', '');
     log('info', '🎵 Démarrage Audio Bridge Manager...');