ad-lib

(lede) by everyone Sat Feb 12 2000 at 20:39:21
To speak or to play a piece of music without preparation;
improvise;
as, Most of his speech was ad-libbed.
Latin ad libitum (at one's pleasure).
(idea) by The Cow Wed Nov 22 2000 at 14:02:38
Also, when capitalised (Ad-Lib) the name of an ancient standard in computer music, which is pre-Sound Blaster. This died a death when Windoze came along, with it's Windows Sound System which is probably the only Good Thing that Microsoft ever came up with.
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