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DVD: Also known as "Digital Versatile Disc" and "Digital Video Disc", is a popular optical disc storage
media format used for data storage, mainly movies. Most DVDs are of the same dimensions as
compact discs, but store more than 6 times the data.
Equalizer: Equalization (or equalisation, EQ) is the process of changing the frequency envelope of a
sound. The audio band is subdivided in 2, 3 or more subbands, the volume of each of these bands can
be amplified or attenuated with an equalizer.
Fader: Is a linear potentiometer. Faders are mostly used to increase or decrease in the level of an
audio signal. By moving the knob, the volume increases or decreases. A fader can be either analogue,
a movement of the knob will result in a change of the resistance or digital, the movement of the knob
generates a binary code, this code is used to change the volume.
Flash card: A memory card or flash memory card is a solid-state (no moving parts) electronic flash
memory data storage device, which can be electrically erased and reprogrammed.
Frequency: Frequency is the measurement of the number of occurrences of a repeated event per unit
of time. The result is measured in hertz (Hz). A baby can hear tones with frequencies from 20Hz to
20000Hz (20kHz), but these frequencies become more difficult to hear as people age. When a tone
with a frequency of 20Hz is played by a loudspeaker, the loudspeaker will reciprocate 20 times per
second.
FX: Abbreviation for effects-unit. An effects unit is used to manipulate the sound of music or voice.
Some effect units transform the sound completely, others just color the sound picture in a minor way.
HD: Abbreviation of hard disc. It is a non-volatile storage device, which stores digitally encoded data on
rapidly rotating platters with magnetic surfaces.
Headphones: Are a pair of tiny loudspeakers that are hold close to humans ears. DJ’s use types with
pads that go around the ears, usually very large and very comfortable.
Hz: Abbreviation of Hertz, named after the German physicist Heinrich Rudolf Hertz. The hertz is the unit
of frequency. Its base unit is cycles per second. Each musical note corresponds to a particular
frequency which can be measured in hertz.
I/O: Abbreviation for input / output
Insert: An insert is an access point built into the mixing console, allowing the user to add external line
level devices into the signal flow.
JACK: It is cylindrical in shape, typically with three contacts (TRS), although sometimes with two (a TS
connector) or four (a TRRS connector). TRS stands for Tip, Ring and Sleeve. In audio-systems, it is
used to connect headphones, microphones, effects-units, electrical musical instruments, etc.
kHz: Abbreviation of kilo Hertz, is 1000Hertz (see Hz)
LED: Abbreviation of Light emitting diode. Is an electronic component that emits light when an electrical
current flows through it.
Loudspeaker: A loudspeaker, speaker, or speaker system is an electromechanical transducer that
converts an electrical signal into sound. The term loudspeaker can refer to individual devices (or
drivers), and complete systems consisting of an enclosure incorporating one or more drivers and
additional electronics.