WAV 16 Bits-44100-Mono is a very rare format for music. There a few converters that can download in that format. I think Notube.me can do this. I use this converter for almost everything I want to download from youtube and I have never had problems with it. The thing I like the most about it is that it has a lot of formats for videos and music and I don't have to pay money for high-quality videos or music. Usually, converters online use monthly membership for downloading high-quality songs and videos and without this membership, all you can download is 360p videos.
