Update app.py

app.py

@@ -119,9 +119,9 @@ async def main(
     request: Request,
     text_input: str = Form(default="1, 2, 3. This is a test. Enter some text to generate."),
     speaker: str = Form(...),
-    speed_slider: float,
-    noise_scale_slider: float,
-    noise_scale_w_slider: float,
+    speed_slider: float = Form(...),
+    noise_scale_slider: float = Form(...),
+    noise_scale_w_slider: float = Form(...),
     play: bool = Form(True)
 ):
     """Main entry point"""