diff --git a/app/main.py b/app/main.py
index 4130f3c..826a0c2 100644
--- a/app/main.py
+++ b/app/main.py
@@ -126,11 +126,15 @@ async def ws_transcribe(ws: WebSocket):
             seg = await queue.get()
             if seg is None:
                 return
+            print(f"[réunion {meeting_id}] segment {seg.t0:.1f}s → {seg.t1:.1f}s "
+                  f"({len(seg.pcm) / 2 / SAMPLE_RATE:.1f}s d'audio), transcription...", flush=True)
             try:
                 text = await transcribe(seg.pcm)
             except Exception as exc:
+                print(f"[réunion {meeting_id}] ERREUR ASR : {exc}", flush=True)
                 await ws.send_json({"type": "error", "message": f"Transcription échouée : {exc}"})
                 continue
+            print(f"[réunion {meeting_id}] texte : {text[:80]!r}", flush=True)
             if not text:
                 continue
             await db.execute(
diff --git a/app/static/app.js b/app/static/app.js
index 7b65e69..a49bac3 100644
--- a/app/static/app.js
+++ b/app/static/app.js
@@ -63,12 +63,22 @@ async function startRecording() {
 }
 
 function queuePcm(samples) {
+  updateVu(samples);
   if (!state.recording || !state.ws || state.ws.readyState !== WebSocket.OPEN) return;
   state.sendBuffer.push(samples);
   state.sendBufferSamples += samples.length;
   if (state.sendBufferSamples >= BATCH_SAMPLES) flushPcm();
 }
 
+function updateVu(samples) {
+  let peak = 0;
+  for (let i = 0; i < samples.length; i += 4) {
+    const v = Math.abs(samples[i]);
+    if (v > peak) peak = v;
+  }
+  $('vu-bar').style.width = Math.min(100, (peak / 32768) * 140) + '%';
+}
+
 function flushPcm() {
   if (!state.sendBufferSamples) return;
   const out = new Int16Array(state.sendBufferSamples);
@@ -97,6 +107,7 @@ function stopRecording(abrupt = false) {
   $('record-btn').textContent = '● Démarrer';
   $('record-btn').classList.remove('recording');
   $('title').disabled = false;
+  $('vu-bar').style.width = '0%';
 }
 
 function onServerMessage(event) {
diff --git a/app/static/index.html b/app/static/index.html
index 99c72f4..d4f8fd9 100644
--- a/app/static/index.html
+++ b/app/static/index.html
@@ -24,6 +24,7 @@
         <input id="title" type="text" placeholder="Titre de la réunion (optionnel)">
         <button id="record-btn" class="record">● Démarrer</button>
         <span id="timer">00:00</span>
+        <div id="vu" title="Niveau du micro"><div id="vu-bar"></div></div>
       </section>
 
       <section id="transcript-panel">
diff --git a/app/static/style.css b/app/static/style.css
index 6708f4d..ea03c74 100644
--- a/app/static/style.css
+++ b/app/static/style.css
@@ -92,6 +92,21 @@ button.record { background: var(--accent); font-weight: 600; min-width: 130px; }
 button.record.recording { background: var(--rec); }
 #timer { font-variant-numeric: tabular-nums; color: var(--muted); min-width: 48px; }
 
+#vu {
+  width: 70px;
+  height: 8px;
+  border-radius: 999px;
+  background: var(--panel-2);
+  overflow: hidden;
+}
+#vu-bar {
+  height: 100%;
+  width: 0%;
+  border-radius: 999px;
+  background: linear-gradient(90deg, #3dd68c, #ffd166 70%, #e5484d);
+  transition: width 80ms linear;
+}
+
 #transcript-panel {
   flex: 1;
   display: flex;