diff --git a/backend/fastrtc/stream.py b/backend/fastrtc/stream.py
index a826213..d87b9d5 100644
--- a/backend/fastrtc/stream.py
+++ b/backend/fastrtc/stream.py
@@ -65,6 +65,7 @@ class Stream(WebRTCConnectionMixin):
         modality: Literal["video", "audio", "audio-video"] = "video",
         concurrency_limit: int | None | Literal["default"] = "default",
         time_limit: float | None = None,
+        allow_extra_tracks: bool = False,
         rtp_params: dict[str, Any] | None = None,
         rtc_configuration: dict[str, Any] | None = None,
         track_constraints: dict[str, Any] | None = None,
@@ -85,6 +86,7 @@ class Stream(WebRTCConnectionMixin):
             int | Literal["default"] | None, concurrency_limit
         )
         self.time_limit = time_limit
+        self.allow_extra_tracks = allow_extra_tracks
         self.additional_output_components = additional_outputs
         self.additional_input_components = additional_inputs
         self.additional_outputs_handler = additional_outputs_handler
diff --git a/backend/fastrtc/webrtc.py b/backend/fastrtc/webrtc.py
index 2883133..75c4220 100644
--- a/backend/fastrtc/webrtc.py
+++ b/backend/fastrtc/webrtc.py
@@ -82,6 +82,7 @@ class WebRTC(Component, WebRTCConnectionMixin):
         rtc_configuration: dict[str, Any] | None = None,
         track_constraints: dict[str, Any] | None = None,
         time_limit: float | None = None,
+        allow_extra_tracks: bool = False,
         mode: Literal["send-receive", "receive", "send"] = "send-receive",
         modality: Literal["video", "audio", "audio-video"] = "video",
         rtp_params: dict[str, Any] | None = None,
@@ -114,6 +115,7 @@ class WebRTC(Component, WebRTCConnectionMixin):
             rtc_configuration: WebRTC configuration options. See https://developer.mozilla.org/en-US/docs/Web/API/RTCPeerConnection/RTCPeerConnection . If running the demo on a remote server, you will need to specify a rtc_configuration. See https://freddyaboulton.github.io/gradio-webrtc/deployment/
             track_constraints: Media track constraints for WebRTC. For example, to set video height, width use {"width": {"exact": 800}, "height": {"exact": 600}, "aspectRatio": {"exact": 1.33333}}
             time_limit: Maximum duration in seconds for recording.
+            allow_extra_tracks: Allow tracks not supported by the modality. For example, a peer connection with an audio track would be allowed even if modality is 'video', which normally throws a ``ValueError`` exception.
             mode: WebRTC mode - "send-receive", "receive", or "send".
             modality: Type of media - "video" or "audio".
             rtp_params: See https://developer.mozilla.org/en-US/docs/Web/API/RTCRtpSender/setParameters. If you are changing the video resolution, you can set this to {"degradationPreference": "maintain-framerate"} to keep the frame rate consistent.
@@ -130,6 +132,7 @@ class WebRTC(Component, WebRTCConnectionMixin):
         self.mirror_webcam = mirror_webcam
         self.concurrency_limit = 1
         self.rtc_configuration = rtc_configuration
+        self.allow_extra_tracks = allow_extra_tracks
         self.mode = mode
         self.modality = modality
         self.icon_button_color = icon_button_color
diff --git a/backend/fastrtc/webrtc_connection_mixin.py b/backend/fastrtc/webrtc_connection_mixin.py
index 6d30381..287c64e 100644
--- a/backend/fastrtc/webrtc_connection_mixin.py
+++ b/backend/fastrtc/webrtc_connection_mixin.py
@@ -81,6 +81,7 @@ class WebRTCConnectionMixin:
         self.time_limit: float | None
         self.modality: Literal["video", "audio", "audio-video"]
         self.mode: Literal["send", "receive", "send-receive"]
+        self.allow_extra_tracks: bool
 
     @staticmethod
     async def wait_for_time_limit(pc: RTCPeerConnection, time_limit: float):
@@ -329,6 +330,8 @@ class WebRTCConnectionMixin:
                 if self.modality not in ["video", "audio", "audio-video"]:
                     msg = "Modality must be either video, audio, or audio-video"
                 else:
+                    if self.allow_extra_tracks:
+                        return
                     msg = f"Unsupported track kind '{track.kind}' for modality '{self.modality}'"
                 raise ValueError(msg)
             if body["webrtc_id"] not in self.connections: