Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Robert Keeley (born 26 May 1970) is an American creator of effects pedals. He modifies pre-existing pedals made by companies such as Boss Corporation and as well as creating his own stomp boxes. His most famous guitar effect pedal modifications are the PHAT mod of the Boss BD-2 Blues Driver and the PLUS or FLEXI mods to Ibanez Tube Screamer. This is an example of one of Keeley's modified pedals, wherein he takes a pre-existing pedal and upgrades parts, and makes circuit changes to the electronics to change aspects of its sound. Aside from Boss, Keeley has also tweaked Ibanez and Voodoo Labs pedals. As of 2008, his most popular pedal is a compressor which is a dynamic range compression based on older designs but incorporating an Input Level as well as Attack Time control.

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