initiate speaker output class

app.py

@@ -98,6 +98,8 @@ def main(input_audio):
         api_key=getenv("COQUI_API_KEY"),
     )
 
+    speaker_output = SpeakerOutput.from_default_device()
+
     print("Starting conversation. Press Ctrl+C to exit.")
     while True:
         try:
@@ -108,7 +110,7 @@ def main(input_audio):
             response = agent.respond(transcript)
             logger.info(f"Agent response: {response}")
             output_audio = synthesizer.synthesize(response)
-            return SpeakerOutput.send_audio(audio_segment=output_audio)
+            return speaker_output.send_audio(output_audio)
 
         except Exception as e:
             logger.error("Failed to synthesize response: %s", e)