I'm pretty hopeful these days about Qt for Python and this build system: https://build-system.fman.io/
Unfortunately, it costs money even if your app is OSS, in some cases.
You might be thinking of Justin Frankel: https://en.wikipedia.org/wiki/Justin_Frankel
The connection is still kind of cool though!
He has nothing to do with foobar2000, which BTW has a very poor view of FOSS.
Foobar still can not do proper crossfading on track change!
foobar2000
MusicBee
MediaMonkey
Foobar is almost perfect except the lack of crossfading and broken WASAPI exclusive mode output, which every other WinAmp clone seem to have gotten right, e.g. AIMP.
Most other paint programs all worked based on keyboard shortcuts (which weren't bad, they let you fly through the interface)
iTunes has obviously turned into something else at the time, but SoundJam was fantastic.
I'm not that particular about Winamp's exact interface, but i vastly prefer audio players with a compact layout that is made up by an area displaying the current song, a slider for seeking, play, pause, stop, prev, next buttons and a floating playlist you can change and hide on the fly.