check to see if audio is available

app.py

@@ -7,15 +7,18 @@ pipe = pipeline(task="automatic-speech-recognition",
                 model="openai/whisper-small",
                 device="cuda" if torch.cuda.is_available() else "cpu")
 
+
 def initialize_pipeline(model_name):
     global pipe
     pipe = pipeline(task="automatic-speech-recognition",
-                model=model_name,
-                device="cuda" if torch.cuda.is_available() else "cpu")
+                    model=model_name,
+                    device="cuda" if torch.cuda.is_available() else "cpu")
     return model_name
 
 
 def transcribe(audio):
+    if audio is None:
+        return "No audio input received. Please try again."
     text = pipe(audio)["text"]
     return text