Update app.py

app.py

@@ -139,7 +139,7 @@ if __name__ == "__main__":
         )
         gr.Markdown("## Upload your Solo Piano WAV or MP3 audio or select a sample example audio file")
         
-        input_audio = gr.File(label="Input Solo Piano WAV or MP3 Audio File")
+        input_audio = gr.File(label="Input Solo Piano WAV or MP3 Audio File", file_types=[".wav", ".mp3"])
         
         run_btn = gr.Button("transcribe", variant="primary")