Update app.py

app.py

@@ -4,10 +4,11 @@ import whisper
 # duplicate this space to run on higher CPU power for the large (very precise and multi-lingual) model to work best
  
 def speech_to_text(uploaded, model_size):
+    if not uploaded or not isinstance(uploaded, str):
+        return "No audio file uploaded."
     model = whisper.load_model(model_size)
-    source = uploaded if uploaded is not None else ''
-    result = model.transcribe(source)
-    return f'{result["text"]}'
+    result = model.transcribe(uploaded)
+    return result["text"]
 
 gr.Interface(
     title="",