diff --git a/electron/main.js b/electron/main.js
index 4fade6c..b4ca903 100644
--- a/electron/main.js
+++ b/electron/main.js
@@ -454,7 +454,13 @@ app.whenReady().then(async () => {
       if (users.find(u => u.name === name)) {
         return { success: false, error: `Un utilisateur "${name}" existe déjà` };
       }
-      const user = { name, group, input_channel: parseInt(input_channel), output_channel: output_channel !== null && output_channel !== '' ? parseInt(output_channel) : null };
+      const parsedInput = input_channel !== null && input_channel !== undefined ? parseInt(input_channel) : null;
+      const user = {
+        name,
+        group,
+        input_channel: parsedInput,
+        output_channel: output_channel !== null && output_channel !== '' ? parseInt(output_channel) : null
+      };
       config.server_audio_users = [...users, user];
       writeConfig(config);
       return { success: true, user };
@@ -469,7 +475,13 @@ app.whenReady().then(async () => {
       const users = config.server_audio_users || [];
       const idx = users.findIndex(u => u.name === name);
       if (idx === -1) return { success: false, error: `Utilisateur "${name}" introuvable` };
-      config.server_audio_users[idx] = { name, group, input_channel: parseInt(input_channel), output_channel: output_channel !== null && output_channel !== '' ? parseInt(output_channel) : null };
+      const parsedInput = input_channel !== null && input_channel !== undefined ? parseInt(input_channel) : null;
+      config.server_audio_users[idx] = {
+        name,
+        group,
+        input_channel: parsedInput,
+        output_channel: output_channel !== null && output_channel !== '' ? parseInt(output_channel) : null
+      };
       writeConfig(config);
       return { success: true };
     } catch (error) {
diff --git a/electron/ui/app.js b/electron/ui/app.js
index 49c96a5..98c5262 100644
--- a/electron/ui/app.js
+++ b/electron/ui/app.js
@@ -803,7 +803,7 @@ document.addEventListener('DOMContentLoaded', () => {
     const action = btn.dataset.sauAction;
     const name = btn.dataset.sauName;
     if (action === 'edit') {
-      await editServerAudioUser(name, btn.dataset.sauGroup, parseInt(btn.dataset.sauInput), parseInt(btn.dataset.sauOutput));
+      await editServerAudioUser(name, btn.dataset.sauGroup, btn.dataset.sauInput, btn.dataset.sauOutput);
     } else if (action === 'delete') {
       await deleteServerAudioUser(name);
     }
@@ -874,9 +874,7 @@ function buildChannelOptions(dir) {
     label: names[i] ? `Ch ${i}: ${names[i]}` : `Ch ${i}`
   }));
 
-  if (dir === 'output') {
-    opts.unshift({ value: '', label: 'Aucune sortie' });
-  }
+  opts.unshift({ value: '', label: dir === 'input' ? 'Aucune entrée' : 'Aucune sortie' });
 
   return opts;
 }
@@ -890,8 +888,8 @@ async function addServerAudioUser() {
   const outOpts = buildChannelOptions('output');
 
   const inputField = inOpts
-    ? { name: 'input_channel', label: 'Canal d\'entrée', type: 'select', options: inOpts, default: '0' }
-    : { name: 'input_channel', label: 'Canal entrée (index)', type: 'number', default: 0, min: 0, max: 63 };
+    ? { name: 'input_channel', label: 'Canal d\'entrée', type: 'select', options: inOpts, default: '' }
+    : { name: 'input_channel', label: 'Canal entrée (index, vide = aucune)', type: 'number', default: '', min: 0, max: 63 };
   const outputField = outOpts
     ? { name: 'output_channel', label: 'Canal de sortie', type: 'select', options: outOpts, default: '' }
     : { name: 'output_channel', label: 'Canal sortie (index, vide = aucune)', type: 'number', default: '', min: 0, max: 63 };
@@ -912,7 +910,7 @@ async function addServerAudioUser() {
   const res = await window.electronAPI.serverAudioUsers.create({
     name: result.name.trim(),
     group: result.group,
-    input_channel: parseInt(result.input_channel),
+    input_channel: result.input_channel !== '' ? parseInt(result.input_channel) : null,
     output_channel: result.output_channel !== '' ? parseInt(result.output_channel) : null
   });
 
@@ -931,10 +929,11 @@ async function editServerAudioUser(name, group, input_channel, output_channel) {
   const inOpts = buildChannelOptions('input');
   const outOpts = buildChannelOptions('output');
 
+  const inputDefault = input_channel !== null && input_channel !== undefined && input_channel !== 'null' ? String(input_channel) : '';
   const inputField = inOpts
-    ? { name: 'input_channel', label: 'Canal d\'entrée', type: 'select', options: inOpts, default: String(input_channel) }
-    : { name: 'input_channel', label: 'Canal entrée (index)', type: 'number', default: input_channel, min: 0, max: 63 };
-  const outputDefault = output_channel !== null && output_channel !== undefined ? String(output_channel) : '';
+    ? { name: 'input_channel', label: 'Canal d\'entrée', type: 'select', options: inOpts, default: inputDefault }
+    : { name: 'input_channel', label: 'Canal entrée (index, vide = aucune)', type: 'number', default: inputDefault, min: 0, max: 63 };
+  const outputDefault = output_channel !== null && output_channel !== undefined && output_channel !== 'null' ? String(output_channel) : '';
   const outputField = outOpts
     ? { name: 'output_channel', label: 'Canal de sortie', type: 'select', options: outOpts, default: outputDefault }
     : { name: 'output_channel', label: 'Canal sortie (index, vide = aucune)', type: 'number', default: outputDefault, min: 0, max: 63 };
@@ -954,7 +953,7 @@ async function editServerAudioUser(name, group, input_channel, output_channel) {
   const res = await window.electronAPI.serverAudioUsers.update({
     name,
     group: result.group,
-    input_channel: parseInt(result.input_channel),
+    input_channel: result.input_channel !== '' ? parseInt(result.input_channel) : null,
     output_channel: result.output_channel !== '' ? parseInt(result.output_channel) : null
   });
 
@@ -1118,6 +1117,15 @@ function showModal({ title, fields = [], confirmLabel = 'Confirmer', confirmClas
               <select id="modal-field-${field.name}" class="form-control">${optionsHtml}</select>
             </div>`;
         }
+        if (field.type === 'checkbox') {
+          return `
+            <div class="form-group form-group-check">
+              <label class="check-label">
+                <input type="checkbox" id="modal-field-${field.name}" ${field.default !== false ? 'checked' : ''}>
+                ${escapeHtml(field.label)}
+              </label>
+            </div>`;
+        }
         return `
           <div class="form-group">
             <label>${escapeHtml(field.label)}</label>
@@ -1155,7 +1163,8 @@ function showModal({ title, fields = [], confirmLabel = 'Confirmer', confirmClas
         const result = {};
         fields.forEach(f => {
           const input = document.getElementById(`modal-field-${f.name}`);
-          result[f.name] = input ? input.value : '';
+          if (!input) { result[f.name] = ''; return; }
+          result[f.name] = f.type === 'checkbox' ? input.checked : input.value;
         });
         cleanup(); resolve(result);
       }
diff --git a/electron/ui/styles.css b/electron/ui/styles.css
index 066949a..9d1fca1 100644
--- a/electron/ui/styles.css
+++ b/electron/ui/styles.css
@@ -1044,6 +1044,29 @@ body {
   font-family: inherit;
 }
 
+
+.form-group-check {
+  display: flex;
+  align-items: center;
+  gap: 0.5rem;
+}
+
+.check-label {
+  display: flex;
+  align-items: center;
+  gap: 0.5rem;
+  cursor: pointer;
+  font-size: 0.9rem;
+  color: var(--text-primary);
+}
+
+.check-label input[type="checkbox"] {
+  width: 1rem;
+  height: 1rem;
+  cursor: pointer;
+  accent-color: var(--accent-primary);
+}
+
 /* Routing actions bar */
 
 .routing-actions {
diff --git a/server/bridge/AudioBridge.js b/server/bridge/AudioBridge.js
index a32eb50..d2d9579 100644
--- a/server/bridge/AudioBridge.js
+++ b/server/bridge/AudioBridge.js
@@ -309,6 +309,7 @@ export class AudioBridge extends EventEmitter {
         groupId: userConfig.groupId,
         inputChannel: userConfig.inputChannel,
         outputChannel: userConfig.outputChannel,
+        publish: userConfig.publish !== false,
         liveKitUrl: this.options.liveKitUrl,
         token: userConfig.token,
         sampleRate: this.options.sampleRate,
@@ -338,7 +339,10 @@ export class AudioBridge extends EventEmitter {
 
       await user.start();
       this.serverAudioUsers.set(userConfig.name, user);
-      console.log(`✓ Server audio user "${userConfig.name}" démarré (entrée canal ${userConfig.inputChannel} → sortie canal ${userConfig.outputChannel}, room: ${userConfig.groupId})`);
+      const modeStr = userConfig.publish !== false
+        ? `canal ${userConfig.inputChannel} → sortie canal ${userConfig.outputChannel ?? 'aucune'}`
+        : `écoute seule → sortie canal ${userConfig.outputChannel ?? 'aucune'}`;
+      console.log(`✓ Server audio user "${userConfig.name}" démarré (${modeStr}, room: ${userConfig.groupId})`);
     }
 
     console.log(`✓ ${this.serverAudioUsers.size} server audio user(s) initialisés`);
diff --git a/server/bridge/AudioBridgeManager.js b/server/bridge/AudioBridgeManager.js
index e79e0af..7d7b0e8 100644
--- a/server/bridge/AudioBridgeManager.js
+++ b/server/bridge/AudioBridgeManager.js
@@ -66,10 +66,14 @@ class AudioBridgeManager extends EventEmitter {
           }
         );
 
+        const rawInputChannel = user.input_channel ?? user.inputChannel ?? null;
+        const inputChannel = rawInputChannel !== null && rawInputChannel !== undefined ? rawInputChannel : null;
+        const publish = inputChannel !== null;
+
         token.addGrant({
           room: groupId,
           roomJoin: true,
-          canPublish: true,
+          canPublish: publish,
           canSubscribe: true,
           canPublishData: true
         });
@@ -81,8 +85,9 @@ class AudioBridgeManager extends EventEmitter {
         serverAudioUsers.push({
           name: user.name,
           groupId,
-          inputChannel: user.input_channel ?? user.inputChannel ?? 0,
+          inputChannel,
           outputChannel: outputChannel !== null && outputChannel !== undefined ? outputChannel : null,
+          publish,
           token: jwt
         });
 
diff --git a/server/bridge/ServerAudioUser.js b/server/bridge/ServerAudioUser.js
index 231b223..630def4 100644
--- a/server/bridge/ServerAudioUser.js
+++ b/server/bridge/ServerAudioUser.js
@@ -17,10 +17,13 @@ class ServerAudioUser extends EventEmitter {
     super();
 
     this.name = options.name;
-    this.inputChannel = parseInt(options.inputChannel, 10);
+    this.inputChannel = (options.inputChannel !== null && options.inputChannel !== undefined)
+      ? parseInt(options.inputChannel, 10)
+      : null;
     this.outputChannel = (options.outputChannel !== null && options.outputChannel !== undefined)
       ? parseInt(options.outputChannel, 10)
       : null;
+    this.publish = options.publish !== false; // false = écoute seule
     this.groupId = options.groupId;
     this.frameSize = options.frameSize || 960;
     this.sampleRate = options.sampleRate || 48000;
@@ -45,7 +48,8 @@ class ServerAudioUser extends EventEmitter {
 
   _setupClientEvents() {
     this.client.on('connected', () => {
-      console.log(`[ServerAudioUser:${this.name}] Connecté à room "${this.groupId}" (in:${this.inputChannel} → out:${this.outputChannel ?? 'aucune'})`);
+      const mode = this.publish ? `in:${this.inputChannel} → out:${this.outputChannel ?? 'aucune'}` : `écoute → out:${this.outputChannel ?? 'aucune'}`;
+      console.log(`[ServerAudioUser:${this.name}] Connecté à room "${this.groupId}" (${mode})`);
       this.emit('connected');
     });
 
@@ -78,7 +82,7 @@ class ServerAudioUser extends EventEmitter {
    * @param {Float32Array} float32Data - Données PCM normalisées [-1.0, 1.0]
    */
   sendAudio(float32Data) {
-    if (!this.client.isConnected) return;
+    if (!this.publish || !this.client.isConnected) return;
 
     const pcmBuffer = this._float32ToBuffer(float32Data);
     this.client.sendAudioData(pcmBuffer);