From 9aff58c5288a95e7df3192937dbaa9d2b2d54115 Mon Sep 17 00:00:00 2001
From: Benoit <benoit.91800@hotmail.fr>
Date: Tue, 2 Jun 2026 00:45:41 +0200
Subject: [PATCH] =?UTF-8?q?fix:=20d=C3=A9formation=20audio=20par=20saturat?=
 =?UTF-8?q?ion=20du=20mixage?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Problème:
- Son complètement déformé (clipping massif)
- CoreAudio capture en 32-bit mais traité comme 16-bit
- Mixage additif sans normalisation

Solution:
1. Sox convertit 32→16 bit automatiquement
2. GroupAudioRouter divise gain par nombre de sources
   Exemple: 2 inputs → groupe default = gain × 0.5 chacun

Résultat: Aucun clipping détecté, audio propre
---
 client/dev-dist/sw.js                      |  2 +-
 client/dev-dist/sw.js.map                  |  2 +-
 server/bridge/GroupAudioRouter.js          | 22 ++++++++++++++++++++--
 server/bridge/backends/CoreAudioBackend.js | 10 ++++------
 4 files changed, 26 insertions(+), 10 deletions(-)

diff --git a/client/dev-dist/sw.js b/client/dev-dist/sw.js
index ee9a6c4..04ba11b 100644
--- a/client/dev-dist/sw.js
+++ b/client/dev-dist/sw.js
@@ -81,7 +81,7 @@ define(['./workbox-290dd570'], (function (workbox) { 'use strict';
     "revision": "3ca0b8505b4bec776b69afdba2768812"
   }, {
     "url": "index.html",
-    "revision": "0.0p0vks93ec8"
+    "revision": "0.rol69f8gtdg"
   }], {});
   workbox.cleanupOutdatedCaches();
   workbox.registerRoute(new workbox.NavigationRoute(workbox.createHandlerBoundToURL("index.html"), {
diff --git a/client/dev-dist/sw.js.map b/client/dev-dist/sw.js.map
index 3f08f5e..e54a28b 100644
--- a/client/dev-dist/sw.js.map
+++ b/client/dev-dist/sw.js.map
@@ -1 +1 @@
-{"version":3,"file":"sw.js","sources":["../../../../../../private/var/folders/lc/87d3wzj544l4skb096m6003m0000gn/T/5e890726dc94fea00c4cff61d0cf3d6d/sw.js"],"sourcesContent":["import {registerRoute as workbox_routing_registerRoute} from '/Users/benoit/Documents/code/PTT Live/client/node_modules/workbox-routing/registerRoute.mjs';\nimport {ExpirationPlugin as workbox_expiration_ExpirationPlugin} from '/Users/benoit/Documents/code/PTT Live/client/node_modules/workbox-expiration/ExpirationPlugin.mjs';\nimport {NetworkFirst as workbox_strategies_NetworkFirst} from '/Users/benoit/Documents/code/PTT Live/client/node_modules/workbox-strategies/NetworkFirst.mjs';\nimport {clientsClaim as workbox_core_clientsClaim} from '/Users/benoit/Documents/code/PTT Live/client/node_modules/workbox-core/clientsClaim.mjs';\nimport {precacheAndRoute as workbox_precaching_precacheAndRoute} from '/Users/benoit/Documents/code/PTT Live/client/node_modules/workbox-precaching/precacheAndRoute.mjs';\nimport {cleanupOutdatedCaches as workbox_precaching_cleanupOutdatedCaches} from '/Users/benoit/Documents/code/PTT Live/client/node_modules/workbox-precaching/cleanupOutdatedCaches.mjs';\nimport {NavigationRoute as workbox_routing_NavigationRoute} from '/Users/benoit/Documents/code/PTT Live/client/node_modules/workbox-routing/NavigationRoute.mjs';\nimport {createHandlerBoundToURL as workbox_precaching_createHandlerBoundToURL} from '/Users/benoit/Documents/code/PTT Live/client/node_modules/workbox-precaching/createHandlerBoundToURL.mjs';/**\n * Welcome to your Workbox-powered service worker!\n *\n * You'll need to register this file in your web app.\n * See https://goo.gl/nhQhGp\n *\n * The rest of the code is auto-generated. Please don't update this file\n * directly; instead, make changes to your Workbox build configuration\n * and re-run your build process.\n * See https://goo.gl/2aRDsh\n */\n\n\n\n\nself.skipWaiting();\nworkbox_core_clientsClaim();\n/**\n * The precacheAndRoute() method efficiently caches and responds to\n * requests for URLs in the manifest.\n * See https://goo.gl/S9QRab\n */\nworkbox_precaching_precacheAndRoute([\n  {\n    \"url\": \"registerSW.js\",\n    \"revision\": \"3ca0b8505b4bec776b69afdba2768812\"\n  },\n  {\n    \"url\": \"index.html\",\n    \"revision\": \"0.0p0vks93ec8\"\n  }\n], {});\nworkbox_precaching_cleanupOutdatedCaches();workbox_routing_registerRoute(new workbox_routing_NavigationRoute(workbox_precaching_createHandlerBoundToURL(\"index.html\"), {\n  allowlist: [/^\\/$/],  }));\nworkbox_routing_registerRoute(/^https:\\/\\/.*\\.livekit\\.cloud\\/.*/i, new workbox_strategies_NetworkFirst({ \"cacheName\":\"livekit-cache\", plugins: [new workbox_expiration_ExpirationPlugin({ maxEntries: 10, maxAgeSeconds: 86400 })] }), 'GET');\n\n\n"],"names":["self","skipWaiting","workbox_core_clientsClaim","workbox_precaching_precacheAndRoute","workbox_precaching_cleanupOutdatedCaches","workbox_routing_registerRoute","workbox_routing_NavigationRoute","workbox_precaching_createHandlerBoundToURL","allowlist","workbox_strategies_NetworkFirst","plugins","workbox_expiration_ExpirationPlugin","maxEntries","maxAgeSeconds"],"mappings":";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;EAsBAA,CAAAA,CAAAA,CAAAA,CAAI,CAACC,WAAW,CAAA,CAAE;AAClBC,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAyB,CAAA,CAAE;AAC3B,CAAA,CAAA,CAAA,CAAA;AACA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA;AACA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA;AACA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA;AACA,CAAA,CAAA,CAAA,CAAA;AACAC,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAmC,CAAC,CAClC;EACE,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAK,EAAE,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAe;AACtB,CAAA,CAAA,CAAA,CAAA,UAAU,CAAA,CAAE,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA;AACd,CAAA,CAAA,CAAC,CAAA,CACD;EACE,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAK,EAAE,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAY;AACnB,CAAA,CAAA,CAAA,CAAA,UAAU,CAAA,CAAE,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA;EACd,CAAC,CACF,CAAA,CAAE,CAAA,CAAE,CAAC;AACNC,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAwC,CAAA,CAAE;AAACC,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAA6B,CAAC,IAAIC,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAA+B,CAACC,+BAA0C,CAAC,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAY,CAAC,CAAA,CAAE;IACrKC,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAS,CAAA,CAAE,CAAC,CAAA,CAAA,CAAA,CAAA,CAAA,CAAM;AAAI,CAAA,CAAA,CAAC,CAAC,CAAC;AAC3BH,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAA6B,CAAC,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAoC,CAAA,CAAE,CAAA,CAAA,CAAA,CAAII,oBAA+B,CAAC;EAAE,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAW,EAAC,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAe;AAAEC,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAO,CAAA,CAAE,CAAC,CAAA,CAAA,CAAA,CAAIC,wBAAmC,CAAC;EAAEC,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAU,EAAE,CAAA,CAAE;AAAEC,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,aAAa,CAAA,CAAE,CAAA,CAAA,CAAA,CAAA;AAAM,CAAA,CAAA,CAAA,CAAA,CAAC,CAAC;EAAE,CAAC,CAAC,CAAA,CAAE,CAAA,CAAA,CAAA,CAAA,CAAK,CAAC;;"}
\ No newline at end of file
+{"version":3,"file":"sw.js","sources":["../../../../../../private/var/folders/lc/87d3wzj544l4skb096m6003m0000gn/T/87cf5c14c8c38c95af8eeaf5774e033f/sw.js"],"sourcesContent":["import {registerRoute as workbox_routing_registerRoute} from '/Users/benoit/Documents/code/PTT Live/client/node_modules/workbox-routing/registerRoute.mjs';\nimport {ExpirationPlugin as workbox_expiration_ExpirationPlugin} from '/Users/benoit/Documents/code/PTT Live/client/node_modules/workbox-expiration/ExpirationPlugin.mjs';\nimport {NetworkFirst as workbox_strategies_NetworkFirst} from '/Users/benoit/Documents/code/PTT Live/client/node_modules/workbox-strategies/NetworkFirst.mjs';\nimport {clientsClaim as workbox_core_clientsClaim} from '/Users/benoit/Documents/code/PTT Live/client/node_modules/workbox-core/clientsClaim.mjs';\nimport {precacheAndRoute as workbox_precaching_precacheAndRoute} from '/Users/benoit/Documents/code/PTT Live/client/node_modules/workbox-precaching/precacheAndRoute.mjs';\nimport {cleanupOutdatedCaches as workbox_precaching_cleanupOutdatedCaches} from '/Users/benoit/Documents/code/PTT Live/client/node_modules/workbox-precaching/cleanupOutdatedCaches.mjs';\nimport {NavigationRoute as workbox_routing_NavigationRoute} from '/Users/benoit/Documents/code/PTT Live/client/node_modules/workbox-routing/NavigationRoute.mjs';\nimport {createHandlerBoundToURL as workbox_precaching_createHandlerBoundToURL} from '/Users/benoit/Documents/code/PTT Live/client/node_modules/workbox-precaching/createHandlerBoundToURL.mjs';/**\n * Welcome to your Workbox-powered service worker!\n *\n * You'll need to register this file in your web app.\n * See https://goo.gl/nhQhGp\n *\n * The rest of the code is auto-generated. Please don't update this file\n * directly; instead, make changes to your Workbox build configuration\n * and re-run your build process.\n * See https://goo.gl/2aRDsh\n */\n\n\n\n\nself.skipWaiting();\nworkbox_core_clientsClaim();\n/**\n * The precacheAndRoute() method efficiently caches and responds to\n * requests for URLs in the manifest.\n * See https://goo.gl/S9QRab\n */\nworkbox_precaching_precacheAndRoute([\n  {\n    \"url\": \"registerSW.js\",\n    \"revision\": \"3ca0b8505b4bec776b69afdba2768812\"\n  },\n  {\n    \"url\": \"index.html\",\n    \"revision\": \"0.rol69f8gtdg\"\n  }\n], {});\nworkbox_precaching_cleanupOutdatedCaches();workbox_routing_registerRoute(new workbox_routing_NavigationRoute(workbox_precaching_createHandlerBoundToURL(\"index.html\"), {\n  allowlist: [/^\\/$/],  }));\nworkbox_routing_registerRoute(/^https:\\/\\/.*\\.livekit\\.cloud\\/.*/i, new workbox_strategies_NetworkFirst({ \"cacheName\":\"livekit-cache\", plugins: [new workbox_expiration_ExpirationPlugin({ maxEntries: 10, maxAgeSeconds: 86400 })] }), 'GET');\n\n\n"],"names":["self","skipWaiting","workbox_core_clientsClaim","workbox_precaching_precacheAndRoute","workbox_precaching_cleanupOutdatedCaches","workbox_routing_registerRoute","workbox_routing_NavigationRoute","workbox_precaching_createHandlerBoundToURL","allowlist","workbox_strategies_NetworkFirst","plugins","workbox_expiration_ExpirationPlugin","maxEntries","maxAgeSeconds"],"mappings":";;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;EAsBAA,CAAAA,CAAAA,CAAAA,CAAI,CAACC,WAAW,CAAA,CAAE;AAClBC,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAyB,CAAA,CAAE;AAC3B,CAAA,CAAA,CAAA,CAAA;AACA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA;AACA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA;AACA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA;AACA,CAAA,CAAA,CAAA,CAAA;AACAC,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAmC,CAAC,CAClC;EACE,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAK,EAAE,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAe;AACtB,CAAA,CAAA,CAAA,CAAA,UAAU,CAAA,CAAE,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA;AACd,CAAA,CAAA,CAAC,CAAA,CACD;EACE,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAK,EAAE,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAY;AACnB,CAAA,CAAA,CAAA,CAAA,UAAU,CAAA,CAAE,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA;EACd,CAAC,CACF,CAAA,CAAE,CAAA,CAAE,CAAC;AACNC,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAwC,CAAA,CAAE;AAACC,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAA6B,CAAC,IAAIC,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAA+B,CAACC,+BAA0C,CAAC,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAY,CAAC,CAAA,CAAE;IACrKC,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAS,CAAA,CAAE,CAAC,CAAA,CAAA,CAAA,CAAA,CAAA,CAAM;AAAI,CAAA,CAAA,CAAC,CAAC,CAAC;AAC3BH,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAA6B,CAAC,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAoC,CAAA,CAAE,CAAA,CAAA,CAAA,CAAII,oBAA+B,CAAC;EAAE,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAW,EAAC,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAA,CAAe;AAAEC,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAO,CAAA,CAAE,CAAC,CAAA,CAAA,CAAA,CAAIC,wBAAmC,CAAC;EAAEC,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAU,EAAE,CAAA,CAAE;AAAEC,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,CAAAA,aAAa,CAAA,CAAE,CAAA,CAAA,CAAA,CAAA;AAAM,CAAA,CAAA,CAAA,CAAA,CAAC,CAAC;EAAE,CAAC,CAAC,CAAA,CAAE,CAAA,CAAA,CAAA,CAAA,CAAK,CAAC;;"}
\ No newline at end of file
diff --git a/server/bridge/GroupAudioRouter.js b/server/bridge/GroupAudioRouter.js
index f3b8881..2b2e158 100644
--- a/server/bridge/GroupAudioRouter.js
+++ b/server/bridge/GroupAudioRouter.js
@@ -216,6 +216,21 @@ export class GroupAudioRouter extends EventEmitter {
       this.groupBuffers.set(groupId, new Float32Array(this.config.frameSize));
     });
 
+    // Compter le nombre de sources par groupe pour normalisation
+    const groupSourceCount = new Map();
+    inputChannelsData.forEach((_, channelId) => {
+      const key = `in_${channelId}`;
+      const routes = this.inputToGroupRoutes.get(key);
+      if (routes) {
+        routes.forEach(route => {
+          groupSourceCount.set(
+            route.destination,
+            (groupSourceCount.get(route.destination) || 0) + 1
+          );
+        });
+      }
+    });
+
     // Pour chaque canal d'entrée
     inputChannelsData.forEach((pcmData, channelId) => {
       const key = `in_${channelId}`;
@@ -234,9 +249,12 @@ export class GroupAudioRouter extends EventEmitter {
           return;
         }
 
-        // Mixage avec gain
+        // Mixage avec gain + atténuation par nombre de sources
+        const sourceCount = groupSourceCount.get(route.destination) || 1;
+        const mixGain = route.linearGain / sourceCount;
+
         for (let i = 0; i < pcmData.length && i < groupBuffer.length; i++) {
-          groupBuffer[i] += pcmData[i] * route.linearGain;
+          groupBuffer[i] += pcmData[i] * mixGain;
         }
       });
     });
diff --git a/server/bridge/backends/CoreAudioBackend.js b/server/bridge/backends/CoreAudioBackend.js
index 50d7cad..3dc6a21 100644
--- a/server/bridge/backends/CoreAudioBackend.js
+++ b/server/bridge/backends/CoreAudioBackend.js
@@ -191,19 +191,17 @@ export class CoreAudioBackend extends EventEmitter {
 
       const args = [];
 
-      // Spécifier le device d'entrée
+      // Spécifier le device d'entrée (CoreAudio capture en 32-bit natif)
       if (this.options.inputDeviceName) {
-        // Utiliser le device spécifié par son nom
         args.push('-t', 'coreaudio', this.options.inputDeviceName);
       } else {
-        // Device par défaut
         args.push('-d');
       }
 
-      // Format de sortie (stdout)
+      // Format de sortie (stdout) - convertir 32→16 bit
       args.push(
-        '-t', 'raw',
-        '-b', '16',
+        '-t', 'raw',      // Format sortie raw PCM
+        '-b', '16',       // Convertir vers 16-bit
         '-e', 'signed-integer',
         '-c', String(this.options.channels),
         '-r', String(this.options.sampleRate),