Fix minor bug

app.py

@@ -113,7 +113,7 @@ with demo:
                 yt_audio_path = gr.Textbox(visible=False)
 
             preview_btn.click(fn=populate_metadata,
-                            inputs=[link, model],
+                            inputs=[link],
                             outputs=[img, title, yt_audio, yt_audio_path])
             
             with gr.Row():
@@ -126,7 +126,7 @@ with demo:
             piano_roll = gr.Image()
             score = gr.Image()
         btn.click(inference,
-                  inputs=yt_audio_path,
+                  inputs=[yt_audio_path, model],
                   outputs=[midi_file, midi_audio, piano_roll, score])
 
     gr.Markdown('''