diff --git a/raspberry/roberto/camera/camera_gstreamer_webrtc.py b/raspberry/roberto/camera/camera_gstreamer_webrtc.py
index 78e3961..459992d 100644
--- a/raspberry/roberto/camera/camera_gstreamer_webrtc.py
+++ b/raspberry/roberto/camera/camera_gstreamer_webrtc.py
@@ -93,7 +93,8 @@ PIPELINE_DESC_RASPBERRY = '''
      rtph264pay config-interval=-1 name=payloader !
      application/x-rtp,media=video,encoding-name=H264,payload=96 ! tee name=video-tee !
      queue ! fakesink sync=true
-    audiotestsrc wave=red-noise is-live=true ! opusenc ! rtpopuspay pt=97 ! tee name=audio-tee !
+    audiotestsrc wave=red-noise is-live=true ! audioconvert ! audioresample ! queue ! opusenc ! rtpopuspay !
+     queue ! application/x-rtp,media=audio,encoding-name=OPUS,payload=97 ! tee name=audio-tee !
      queue ! fakesink sync=true
     '''