Update app.py

app.py

@@ -197,7 +197,7 @@ def tts_streaming(text: str, voice: str = "af_heart", speed: float = 1.0, format
             if i == 0:
                 tokens_to_send = [0] + chunk_tokens
             else:
-                tokens_to_send = [prev_last_token] + chunk_tokens
+                tokens_to_send = [prev_last_token] + [0] + chunk_tokens
 
             # Save the last token of this chunk for the next iteration.
             prev_last_token = tokens_to_send[-1]