Modulation is the addition of a control signal to an electronic or optical signal carrier. In electronic synthesis, one example might be the sine wave output of a low frequency generator (LFO) being added to a pitched note produces vibrato.

A coincident-pair stereo microphone technique using a forward-facing unidirectional, omnidirectional, or bidirectional mic and a side-facing bidirectional mic. The microphone signals are summed and differenced to produce right- and left-channel signals.

may refer to: Stereophonic sound, namely two channel audio. Surround sound, more than two channels though still technically stereo. Ambisonics, a studio or live way of recording with many channels.

An electronic device that consists of a RF signal splitter preceded by a RF amplifier that compensates for the inherent RF loss of the splitter. Allows for feeding several receivers from one antenna.

Radio frequency signals arriving at a location via different transmission paths, usually from a combination of direct and reflected signals. The direct and reflected signals are often opposite in phase, which can result in a significant signal loss. The problem is most apparent indoors and in areas where many metallic surfaces are present.

A small area or space where direct and reflected RF signals from a transmitter cancel each other, resulting in little or no usable energy being available to a receiver antenna.

Refers to a type of microphone where the polar pattern of the capsule can be changed, either using a switch a changing out the capsule.

An electronic synthesizer or sampler that is capable of playing back multiple parts simultaneously, each under the control of a different MIDI channel. Not to be confused with polyphony, which refers to total number of simultaneous notes (or voices) that is available to the whole instrument.
(See MIDI)

In reference to digital audio and computers, the term means software that uses the processing power of the computer, and does not require additional hardware. Also sometimes referred to as host based. However, plugin architectures that are written for native systems are not technically native themselves, since they require the presence of other software to actually function.

Although not technically correct, the term near field is generally applied to a loudspeaker system that is designed to be close to the monitoring position. In this way the listener receives more of the direct sound from the speakers, while minimizing the effect of sound produced by reflections from walls, floors and ceilings.