Update lid.py

lid.py

@@ -30,6 +30,9 @@ def identify(audio_source=None, microphone=None, file_upload=None):
     audio_fp = (
         file_upload if "upload" in str(audio_source or "").lower() else microphone
     )
+    if audio_fp is None:
+        return "ERROR: You have to either use the microphone or upload an audio file"
+    
     audio_samples = librosa.load(audio_fp, sr=LID_SAMPLING_RATE, mono=True)[0]
 
     inputs = processor(