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Line 1: '''Frac Rack''', or '''~~FracRak~~Frac''', orfrom ''~~'Frac'~~Fractional Rack'', is the modular synthesizer format designed by [[John Simonton]] of [[PAiA Electronics Inc\|PAiA]]. It has a mainly USA following largely through the popularity of [[Blacet Research\|Blacet]] modules.<ref name="measures">[http://www.electro-music.com/forum/viewtopic.php?t=18281&postorder=asc Standard measurements in front panels], Electro-music.com forum, April 2006</ref><ref name="an">[http://www.analognotes.com/ Analog Notes]</ref><ref name="list">[http://www.muffwiggler.com/forum/viewtopic.php?t=1461 List of Frac module manufacturers], Muff's Modules & More forum, August 2008</ref> Like the [[Eurorack]] format, Frac is considered a [[3U]] format. The height of most modern modular synthesizer modules is measured by the number of vertical units it consumes in a standard [[19-inch rack\|19" equipment rack]]. Modules conforming to the 3U format will take up three vertical units in a 19" equipment rack. Each vertical rack unit is 1¾", so a 3U module is 5¼" tall. The Frac format has a standard width unit of 1½". So 3" and 4½" wide modules are common in this format.<ref name="measures" />

Frac rack: Difference between revisions

Frac rack (view source)