return "audio.wav"
    def _run(
        self,
        query: str,
        run_manager: Optional[CallbackManagerForToolRun] = None,
    ) -> str:
        """Use the tool."""
        all_params = {
            "text": query,
            "language": self.language,
            "option": self.voice,
            "return_type": self.return_type,
            "rate": self.rate,
            "pitch": self.pitch,
            "volume": self.volume,
            "audio_format": self.audio_format,
            "sampling_rate": self.sampling_rate,
            "settings": self.voice_models,
        }
        # filter so we don't send val to api when val is `None
        query_params = {k: v for k, v in all_params.items() if v is not None}
        return self._call_eden_ai(query_params)