Update app.py

app.py

@@ -116,6 +116,13 @@ def load_presets():
         print("Presets folder not found")
         return {}
 
+# Always define preset_choices, even if empty
+preset_choices = load_presets()
+
+# Provide fallback if no presets found
+if not preset_choices:
+    preset_choices = {"Default": []}
+
 # === Main Processing Function ===
 def process_audio(audio_file, selected_effects, isolate_vocals, preset_name):
     audio = AudioSegment.from_file(audio_file)