Update app.py

app.py

@@ -125,9 +125,8 @@ It allows precise temporal control over when events happen in the generated audi
 ## Input Requirements & Format
 
 - **TCC** is **required** for audio generation.
-- **TDC** is **optional**. If provided, it should follow the format:  event1(start1-end1, start2-end2); event2(start1-end1, ...)
-        *Example*:  a dog barks(1.0-2.0, 3.0-4.0); a man speaks(5.0-6.0)
-- **Length** (in seconds) is optional, but recommended for temporal control.
+- **TDC** is **optional**. If provided, it should follow the format:  `event1(start1-end1, start2-end2); event2(start1-end1, ...)`
+- **Length** (in seconds) is optional, but recommended for temporal control. The length defaults to 10.0 seconds.
 - **Enable Time Control**: Tick to use TDC and length for precise event timing.
 
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@@ -135,7 +134,7 @@ It allows precise temporal control over when events happen in the generated audi
 ## Notes
 
 - If TDC format is incorrect or length is missing, the model will generate audio **without precise temporal control**. 
-- For general audio generation, it is recommended to input '"random"' for TDC.
+- For general audio generation, it is recommended to input `random` for TDC.
 - You may leave TDC blank to let the LLM generate timestamps automatically (subject to API quota).
 ---
 """