What seems like a long time ago, now, I remember Winamp being relatively new, and it had a bunch of visualisation plugins. Milkdrop was fun for shits and giggles, but my favourite was always the spectrogram, and I'd just sit there and watch songs playing, trying to track specific instruments to their changes on the screen.
A while back, this winamp plugin stopped working. Because winamp development has been dead in the water for a few years now, this week I started playing around with foobar (after having meant to do so a decade or more ago), and I was pretty thrilled to find it has a spectrogram plugin, too.
All day I've been listening to Mogwai and Godspeed you! Black emperor, with the spectrogram full-screen on my second monitor.
I'm not being very productive, today. But I am enjoying it so much.
What are your favourite visualisations for music?