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Re:Today – 20 years ago – Winamp was released by detaro on Friday April 21, 2017 @05:54PM (#14169729)
Quodlibet seems fairly close to "cross-plattform foobar2000" (depending on what exactly is important to you of course)

https://github.com/quodlibet/quodlibet

Re:Today – 20 years ago – Winamp was released by rfz on Monday April 24, 2017 @07:15AM (#14183340)
Good call! I actually landed on this one the other day after looking more into my options. I hadn't realized before that tag editing is available from within the app.