Update app.py

app.py

@@ -201,7 +201,7 @@ def tts_streaming(text: str, voice: str = "af_heart", speed: float = 1.0, format
                 # token_to_send = [0] + chunk_tokens
 
             # Save the last token of this chunk for the next iteration.
-            prev_last_token = chunk_tokens[-1]
+            prev_last_token = chunk_tokens[-2:]
 
             # Prepare the model input (a batch of one sequence).
             final_token = [tokens_to_send]