Update app.py

app.py

@@ -39,11 +39,19 @@ def separate_audio(audio_file):
     if audio_file is None:
         return None, None
 
-    output_paths = separator.separate(audio_file)
+    raw_outputs = separator.separate(audio_file)
+
+    # separator.separate() returns bare filenames, not full paths — they
+    # actually get written under separator.output_dir. Without joining them
+    # back to that directory, Gradio resolves the relative filename against
+    # the app's cwd instead of where the files really are, which is what
+    # caused the empty players / 403 on download.
+    output_paths = [
+        p if os.path.isabs(p) else os.path.join(separator.output_dir, p)
+        for p in raw_outputs
+    ]
+    output_paths = [os.path.abspath(p) for p in output_paths]
 
-    # audio-separator returns a list of output file paths (order/count
-    # depends on the model). We sort them so the "instrumental"-labeled
-    # file and "vocals"-labeled file land in predictable slots.
     vocals_path = next((p for p in output_paths if "vocal" in p.lower()), None)
     instrumental_path = next(
         (p for p in output_paths if p != vocals_path), None
@@ -70,4 +78,6 @@ ui = gr.Interface(
 )
 
 if __name__ == "__main__":
-    ui.launch()
+    # Explicitly whitelist the output directory for Gradio's file server —
+    # avoids 403s when serving files from a directory outside the app's cwd.
+    ui.launch(allowed_paths=[separator.output_dir])