Update app.py

app.py

@@ -78,7 +78,7 @@ def text_to_speech(text, voice):
     )
     
     #audio = elevenlabs.tts(text=text, voice=voice, model="eleven_monolingual_v1")
-    return audio
+    return b"".join(audio)
 
 def transcribe_audio(audio_file):
     """Transcribes audio using SpeechRecognition."""