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Actually, Winamp is not going Open Source
(programming.dev)
This is a most excellent place for technology news and articles.
Does xmms fit the bill?
Edit: oops. It had its final release in 2007. Shows how much I use Linux for multimedia lately! Around 2000 this was my go-to. I had it hooked up to an Inspiron laptop in my car with a usb game controller to switch tracks and stuff.
https://en.m.wikipedia.org/wiki/XMMS