Fixed read back to bytes

app.py

@@ -15,7 +15,8 @@ def tts_fn(text, prompt_audio, prompt_seconds, inference_steps, inference_temper
     audio_bytes = bytes()
     byte_io = io.BytesIO(audio_bytes)
     wavfile.write(byte_io, sr, prompt_audio)
-    prompt_audio = [base64.b64encode(byte_io).decode('utf-8')]
+    prompt_audio_bytes = byte_io.read()
+    prompt_audio = [base64.b64encode(prompt_audio_bytes).decode('utf-8')]
 
     response = requests.post(
         f'{base_url}',