Update app.py

app.py

@@ -161,7 +161,8 @@ async def generate_accurate_srt(text, voice, rate, pitch, words_per_line, lines_
 
 async def process_text(text, pitch, rate, voice, words_per_line, lines_per_segment):
     pitch_str = f"{pitch}Hz" if pitch != 0 else "0Hz"
-    rate_str = f"{'+' if rate > 0 else ''}{rate}%"
+    # Fix: Always include + sign for zero and positive rates
+    rate_str = f"+{rate}%" if rate >= 0 else f"{rate}%"
     
     srt_path, audio_path = await generate_accurate_srt(
         text,