Update app.py

app.py

@@ -46,7 +46,7 @@ def synthesize(midi_file=None):
     midi = PrettyMIDI(midi_file)
     midi_synth = midi.synthesize(fs=SAMPLE_RATE)
     midi_synth = midi_synth.reshape(midi_synth.shape[0], 1)
-    return midi, (SAMPLE_RATE, midi_synth)
+    return (SAMPLE_RATE, midi_synth)
 
 def upload(midi_file=None):
     if isinstance(midi_file, _TemporaryFileWrapper):
@@ -65,8 +65,8 @@ with gr.Blocks(title="🎹 MIDI-AudioLDM", theme=gr.themes.Base(text_size=gr.the
     with gr.Row():
         with gr.Column(variant='panel'):
             midi_synth = gr.Audio(label="synthesized midi")
-            upload_button = gr.UploadButton("Upload a MIDI file", file_types=[".mid"])
-            midi = gr.File(visible=False, value="S00.mid")
+            upload_button = gr.UploadButton("Upload a MIDI file", file_types=[".mid"], value="S00.mid")
+            midi = gr.File(visible=False)
             upload_button.upload(upload, upload_button, midi)
             upload_button.upload(synthesize, upload_button, midi_synth)
             prompt = gr.Textbox(label="prompt", info="Enter a descriptive text prompt to guide the audio generation.")