Improvising. Often used when referring to running lights on the fly, with nothing pre-programmed. "I've never seen/heard this band and don't know the set-list, so I'm going to be busking the lighting." The failed Tommy Tune musical, Busker Alley, might explain the origins of the term, but the show closed before I could see it.
Tommy Tune played Charlie Baxter, a busker. "Busker" is British slang for a person who entertains people for money in public places (as by singing or dancing), usually while asking for money. As a busker usually has to improvise (given his/her surroundings, audience, etc.) this may be the origin of the term.
For "Tips and Tricks" regarding busking with moving lights, see The Ultimate Punt Page and Busking with Submasters.
Tommy Tune played Charlie Baxter, a busker. "Busker" is British slang for a person who entertains people for money in public places (as by singing or dancing), usually while asking for money. As a busker usually has to improvise (given his/her surroundings, audience, etc.) this may be the origin of the term.
For "Tips and Tricks" regarding busking with moving lights, see The Ultimate Punt Page and Busking with Submasters.