A less-common format of modular synthesizers put forward by PAiA and Blacet Research. It stands for Fractional Rack; one unit is 1.5” (3.8 cm) wide by 3U, or 5.25” (13.3 cm) high.
A less-common format of modular synthesizers put forward by PAiA and Blacet Research. It stands for Fractional Rack; one unit is 1.5” (3.8 cm) wide by 3U, or 5.25” (13.3 cm) high.
