OK, I'm confused.
I have seen 2 different articles that claim WinAmp is NOt going to be open sourced. At least in the common sense. But rather kind - of - sort - of - but - not - really.
Here is a https://www.zdnet.com/home-and-office/home-entertainment/winamp-is-not-going-open-source-heres-what-it-is-doing-and-why/ ZDNET article about it.