DeaDBeeF (as in 0xDEADBEEF) is a modular audio player for GNU/Linux, *BSD, OpenSolaris, macOS, and other UNIX-like systems.

DeaDBeeF lets you play variety of audio formats, convert between them, customize the UI almost any way you want, and use many additional plugins which can extend it even more.

deadbeef.sourceforge.net
deadbeef.sourceforge.net/download
deadbeef.sourceforge.io/plugins.html
play.google.com/store/apps/details?id=org.deadbeef.android

Plugins:
File Browser
lyricbar
mpris2
ddb_musical_spectrum
ddb_quick_search
ddb_spectrogram
ddb_vu_meter
ddb_waveform_seekbar
deadbeef-uade (Amiga)