- REX2
REX2 is a proprietary type of audio sample loop file format developed by Propellerhead, a Swedish music software company.
It is one of the most popular and widely-supported loop file formats for
sequencer and digital audio workstation software. It is supported by Propellerhead Reason, SteinbergCubase , SteinbergNuendo , CockosREAPER , Apple Logic, Digidesign Pro Tools, Cakewalk [http://p5.sonarama.com/p5/index.php/Home|Project5] , Cakewalk Sonar, Image-Line FL Studio, MOTU Digital Performer, MOTU Mach 5 (software sampler), and Synapse Audio Orion Platinum, among others.REX files are named after the three-letter filename suffix for "ReCycle EXport," as these are files generated by Propellerhead's ReCycle looping utility. The
filename extension s for the file format are .rex and .rx2.REX file format and use
REX2 loops are created in ReCycle by analyzing audio files to locate zero crossings in the waveform, usually at the start of a
beat or other rhythmic point. The file is then divided into "slices" delineated by these markers (a form ofmetadata ). This allows compatibleDAW software to adjust the playback start time of each slice, so that the loop can dynamically match the tempo of a song without altering the pitch of the loop, as would normally happen if the audio file was slowed down or sped up. Depending on the host software, individual slices can be triggered viaMIDI notes, and individually tuned up and down in pitch if desired.Royalty Free Rex2 Loop and sample collections are now available from many sources including Smash Up The Studio, Future Loops, Loopmasters, PowerFX, and Mi7 LIbraries.
The original REX format was mono only; REX2 supports
mono orstereo files.The REX2 format uses a proprietary
compression algorithm that can reduce the file size by up to 60%.References
* [http://www.propellerheads.se/technologies/rex/index.cfm?fuseaction=mainframe REX] (on the Propellerhead Software website)
See also
*ReCycle
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