How do I apply a 5 level wavelet to an audio file?

Hello everyone,

I add a wavelet to the example in the link before the stft process. I want to unlock 5 levels. However, I am making such a mistake. How can I solve this?

https://www.mathworks.com/help/deeplearning/ug/denoise-speech-using-deep-learning-networks.html

len=length(audio);
[c,l]=wavedec(audio,5,'bior3.1');
approx = appcoef(c,5,'bior3.1');
[cd1,cd2,cd3,cd4,cd5] = detcoef(c,l,[1 2 3 4 5]);

[Biral Pradhan]

I understand, you want to add a wavelet to the audio in this example. Could you kindly provide more information that can help me understand your workflow? Please include the error messages, if any.