In Reply to: Something like Gradient Audio Level (more) posted by The Other Tom on March 31, 1999 at 05:53:08:
Geschwindigkeit Abhängiger Lautstärkeregle.
Take the initials = G.A.L.
It's German for speed dependent volume control.
The "Gradient Audio Level" was just someone's wild (and English-centric) guess ages ago.