Term used to describe an object with an integral output connector, which plugs into a matching connector on a receiving object. For example, a gooseneck microphone with an output connector that will plug into a matching jack.

Redundant Array of Independent Discs. Basically a method of storing the same data in different places on multiple hard discs, thus increasing fault-tolerance. There are at least nine types of RAID arrays that cover various levels of redundancy (protection) and speeds of data access. In most cases a RAID array appears as a single disc to the operating system of a computer.

A type of connector originally used by RCA to connect their turntables to amplifiers. The name has stuck, and these kinds of connectors, found on consumer and semi-professional equipment are today still referred to as RCA phono connectors.
(See S/PIDF)

Abbreviation for Radio Frequency

The characteristic impedance of an antenna, cable or conductor. A value of 50 ohms is generally used for coaxial cables and RF interface points in wireless systems.

For wireless microphones, a RF amplifier frequently used to overcome the inherent signal losses induced by coaxial RF cables. Also known as a RF preamplifier or booster.

Real Time AudioSuite. Based on Digidesign’s AudioSuite plugin architecture that uses off-line processing, RTAS acts exactly like a TDM plugin , but instead of using Digidesign DSP, uses the host computers processing capability.

A proprietary communication protocol for Roland’s digital audio products. It allows for 8 channels of audio back and forth along with word clock and transport functions over a single cable.

Nowadays referred to as DAT and stands for Rotating Digital Audio Tape. A medium for recording digital audio, it uses similar technology to that of a VCR in which a tape passes slowly over fast rotating heads and records information in a helical scan fashion.

An industry standard measurement for equipment that is to be mounted into racks. The width must conform to 19”, while the height is specified as 1 3/4” or whole multiples thereof. For example equipment height is often specified as 3 rack spaces or 3U high. There is no specification for depth.