Update app.py

app.py

@@ -35,7 +35,7 @@ MODELS = {
 
 def convert_audio_to_wav(audio_path):
     if os.path.isdir(audio_path):
-        raise ValueError(f"The path provided is a directory: {audio_path}")
+        raise ValueError(f"The path provided is a directory, not a file: {audio_path}")
     wav_path = "converted_audio.wav"
     command = ["ffmpeg", "-i", audio_path, "-ac", "1", "-ar", "16000", wav_path]
     subprocess.run(command, stdout=subprocess.PIPE, stderr=subprocess.PIPE)