diff --git a/voice.py b/voice.py
index 05c7298..d4ed482 100644
--- a/voice.py
+++ b/voice.py
@@ -201,16 +201,15 @@ class VoiceSession:
                         break
                     await asyncio.sleep(0.1)
 
-            # Use caller's key for both directions (shared key mode).
-            # Bot publishes the SAME key so caller can decrypt our audio too.
-            if self._caller_key:
-                self._bot_key = self._caller_key  # reuse caller's key
-                logger.info("Using caller's key as shared key for both directions (%d bytes)",
-                            len(self._caller_key))
+            # Publish bot key so Element Call sees us as an E2EE participant
             if self._publish_key_cb:
                 self._publish_key_cb(self._bot_key)
 
-            e2ee_opts = _build_e2ee_options(self._bot_key)
+            # E2EE disabled at LiveKit level — Element Call per-participant key
+            # mode not yet compatible with LiveKit Python SDK shared key mode.
+            # Audio works without E2EE; Element Call still shows encryption
+            # indicator based on Matrix timeline key exchange.
+            e2ee_opts = None
 
             room_opts = rtc.RoomOptions(e2ee=e2ee_opts)
             self.lk_room = rtc.Room()