Frac rack
Frac Rack, FracRak or Frac is the modular synthesizer format designed by John Simonton of PAiA. It has a mainly USA following largely through the popularity of Blacet modules.[1][2][3]
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" 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.[1]
Note that even though the height of both Frac and Euro modules are 3U, differences exist in the mounting system.[2][4][5]
Frac format modules typically use 3.5 mm connectors and plugs for patching, although there are companies that offer modules with banana jacks e.g. BugBrand, Metalbox.[6][7]
Power requirements for Frac modules are typically ±15VDC. Current draw depends on the module. The power connectors are 4 way AMP MTA-156 headers. The control voltage is 1V/octave.[1][2][4]
Frac brands
- Ad Infinitum
- Analog Metropolis
- Bananalogue – Frac with banana jacks
- Barton
- Blacet Research
- Bridechamber
- BugBrand
- CGS[8]
- Cyndustries
- Encore Electronics
- Flight of Harmony
- j3rk
- KissBox
- Livewire Electronics
- Magic Smoke Electronics
- Metalbox
- MFOS – not format specific and can be powered by +/-15V[9]
- Oakley Sound Systems – some support for Frac and some 5U PCBs can fit behind a Frac panel.[10]
- PAIA – pioneers of the Frac format
- STG Soundlabs
- Stroh Modular
- Synthasonic
- Synthesis Technology MOTM – never supported Frac but some 5U PCBs will fit behind a Frac panel.[10]
- Wiard
- YUSynth
Template:From Muff Wiggler wiki
See also
References
- ^ a b c Standard measurements in front panels, Electro-music.com forum, April 2006
- ^ a b c Analog Notes
- ^ List of Frac module manufacturers, Muff's Modules & More forum, August 2008
- ^ a b Blacet FAQ
- ^ Tech Notes, Blacet Research
- ^ Banana Frac: The Definitive Guide, Muff Wiggler forum, August 2009
- ^ Metalbox Info
- ^ which frac filter?, Muff Wiggler forum, Dec 2008
- ^ Modular Addict has MFOS PCB's!, Muff Wiggler forum, Sep 2016
- ^ a b Source for MOTM Frac DIY, Muff Wiggler forum, Sep 2011
External links
- Fractional Rack Modules, Muff's Modules & More forum,
- Standard measurements in front panels, electro-music.com, DIY Hardware and Software forum, May 2007
- About Blacet Research
- Frac on ModularGrid
- EuroSynth – FracRak Comparisons by Laurie Biddulph, 2015