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'''Frac Rack''', '''FracRak''' or '''Frac''' is the modular synthesizer format designed by John Simonton of [[PAiA Electronics Inc|PAiA]]. It has a wide 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>
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
Note that even though the height of both Frac and Euro modules are 3U, differences exist in the
Frac format modules typically use 3.5 mm connectors and plugs for patching, although there are
▲Note that even though the height of both Frac and Euro modules are 3U, differences exist in the mounting rails and screws. Thus, each format requires its own mounting system (screws, rails, etc).<ref name="faq">[http://www.blacet.com/FAQ.html Blacet FAQ]</ref> Paia, Blacet and some of [[Wiard]]'s modules can be mounted in the same rack.<ref>[http://www.blacet.com/tech.html Tech Notes], Blacet Research</ref>
▲Frac format modules typically use 3.5 mm connectors and plugs for patching, although there are several companies that offer modules with banana jacks ([[BugBrand]], [[Metalbox]]).<ref>[https://www.muffwiggler.com/forum/viewtopic.php?t=7514&sid=6d5c4caf944e77c085f0437cf90ce3be Banana Frac: The Definitive Guide], Muff Wiggler forum, August 2009</ref><ref>[http://www.metalbox.com/ Metalbox Info]</ref>
Power requirements for Frac modules are typically ±15VDC. Current draw depends on the module.<ref name="measures" /><ref name="faq" />
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* [[Comparison of 3U module brands]]
* [[Frac Rack DIY parts]]
* [[Banana Frac]]
== References ==
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