Update app.py

app.py

@@ -273,4 +273,4 @@ if __name__ == "__main__":
                                         input_allow_cc],
                                   [output_midi_seq, output_midi_img, output_midi, output_audio])
         stop_btn.click(cancel_run, output_midi_seq, [output_midi, output_audio], cancels=run_event, queue=False)
-    app.queue(2).launch(server_port=opt.port, share=opt.share, inbrowser=True)
+    app.queue(4).launch(server_port=opt.port, share=opt.share, inbrowser=True)