updated musicgen api handler

app.py

@@ -397,7 +397,7 @@ def extend_with_musicgen_api(audio_path, prompt_duration, musicgen_model, output
         # Call the continue_music API
         result = client.predict(
             input_audio_path=handle_file(audio_path),
-            prompt_duration=prompt_duration,  # Already a string from dropdown
+            prompt_duration=prompt_duration,  # Integer from dropdown
             musicgen_model=musicgen_model,
             output_duration=float(output_duration),  # Ensure it's a float
             api_name="/continue_music"
@@ -644,8 +644,8 @@ with gr.Blocks(title="stable-melodyflow") as iface:
         with gr.Column():
             musicgen_prompt_duration = gr.Dropdown(
                 label="prompt duration (seconds)",
-                choices=["3", "5", "7", "10"],  # Strings to match API requirements
-                value="5",
+                choices=[3, 5, 7, 10],  # Back to integers since the function expects numbers
+                value=5,
                 info="how much of the end to use as prompt for continuation"
             )
             musicgen_output_duration = gr.Slider(