async def run_stt(self, audio: bytes) -> AsyncGenerator[Frame, None]:
        """Transcribes an audio segment using Fal's Wizper API.

        Args:
            audio: Raw audio bytes in WAV format (already converted by base class).

        Yields:
            Frame: TranscriptionFrame containing the transcribed text.

        Note:
            The audio is already in WAV format from the SegmentedSTTService.
            Only non-empty transcriptions are yielded.
        """
        try:
            await self.start_processing_metrics()
            await self.start_ttfb_metrics()

            # Send to Fal directly (audio is already in WAV format from base class)
            data_uri = fal_client.encode(audio, "audio/x-wav")
            response = await self._fal_client.run(
                "fal-ai/wizper",
                arguments={"audio_url": data_uri, **self._settings},
            )

            if response and "text" in response:
                text = response["text"].strip()
                if text:  # Only yield non-empty text
                    await self._handle_transcription(text, True, self._settings["language"])
                    logger.debug(f"Transcription: [{text}]")
                    yield TranscriptionFrame(
                        text,
                        "",
                        time_now_iso8601(),
                        Language(self._settings["language"]),
                        result=response,
                    )

        except Exception as e:
            logger.error(f"Fal Wizper error: {e}")
            yield ErrorFrame(f"Fal Wizper error: {str(e)}")
Transcribes an audio segment using Fal's Wizper API.

        Args:
            audio: Raw audio bytes in WAV format (already converted by base class).

        Yields:
            Frame: TranscriptionFrame containing the transcribed text.

        Note:
            The audio is already in WAV format from the SegmentedSTTService.
            Only non-empty transcriptions are yielded.
        
src/pipecat/services/fal/stt.py