fix: format of return audio

app.py

@@ -172,7 +172,7 @@ def delete_folders_and_files(input_dir):
     print("Cleanup completed.")
 
 @spaces.GPU(duration=300)  # Adjust the duration as needed
-def process_audio(uploaded_file, output_format):
+def process_audio(uploaded_file):
     try:
         yield "Processing audio...", None
 
@@ -207,7 +207,7 @@ def process_audio(uploaded_file, output_format):
         move_stems_to_parent(OUTPUT_FOLDER)
 
         yield "Combining stems...", None
-        output_file = combine_stems_for_all(OUTPUT_FOLDER, output_format)
+        output_file = combine_stems_for_all(OUTPUT_FOLDER, "m4a")
 
         yield "Cleaning up...", None
         delete_folders_and_files(OUTPUT_FOLDER)
@@ -221,8 +221,7 @@ def process_audio(uploaded_file, output_format):
 with gr.Blocks() as demo:
     gr.Markdown("# Music Player and Processor")
 
-    file_upload = gr.File(label="Upload WAV file", file_types=[f".{output_format}"])
-    output_format = gr.Dropdown(label="Select Output Format", choices=["wav", "m4a"], value="m4a")
+    file_upload = gr.File(label="Upload WAV file")
 
     process_button = gr.Button("Process Audio")
 
@@ -231,7 +230,7 @@ with gr.Blocks() as demo:
 
     process_button.click(
         fn=process_audio,
-        inputs=[file_upload, output_format],
+        inputs=file_upload,
         outputs=[log_output, processed_audio_output],
         show_progress=True
     )