Update app.py

app.py

@@ -1,6 +1,7 @@
 import os
 import gradio as gr
 import tempfile
+import subprocess
 from uuid import uuid4
 from audio_sep_splitter import batch_process
 
@@ -10,7 +11,9 @@ def split_audio(audio_filepath):
     aggressiveness_factor = 2
     splitter = "phoenix"
     vocal_file = batch_process(audio_filepath, output_file, stem, aggressiveness_factor, splitter)
-    return vocal_file
+    mp3_vocal_file = f"{vocal_file}.mp3"
+    subprocess.run(f"ffmpeg -i '{vocal_file}' '{mp3_vocal_file}'", shell=True)
+    return mp3_vocal_file
 
 interface = gr.Interface(
     split_audio,