Glossary: Equalizer (EQ, EQing)

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Equalizer (EQ, EQing): Based on the root word, equal, an equalizer is an audio device whose function is to equal out the tonal characteristics of a sound. At least that was the idea back in the days when they were first conceived as a tool used to get flat response in telephone lines and to make up for the deficiencies in audio equipment and acoustic spaces. Nowadays it could more aptly be named an "unequalizer" since they are more often used creatively to alter the relative balance of frequencies to produce desired tonal characteristics in sounds. An equalizer has the ability to boost and/or cut the energy (amplitude) in specified frequency ranges by employing one or more filter circuits. There are many different types of EQ's in use today in many widely varying applications, but they fundamentally all do the same thing.

E-Bow	Ear Buds	Ear Fatigue
Early Reflections	Earth Bow	EASI
Ebanol	Ebony	EBU
EccoFonic	Echo	ECP
Eddy Current	Edison Effect	Edison Plug
Edit	Edit Buffer	Edit Master
Edit Decision List	Effects	Effects Loop
Efficiency	Envelope Generator (EG)	EIA
EIDE	EIN	Electro-optical or El-Op
Elco (or Edac)	Electret	Electric Frying Pan
Electro-Optical Circuit	Electroacoustic Music	Electrode
Electromagnetism	Electrophone	Electrostatic
Electrotone	Embedded Servo	Embellishment
Embouchure	EMI	Emphasis
Emulator	Encrypt (Encryption)	Encryption
End Block (Tail Block)	Endian	Endpin
Enharmonic	Ensemble	Envelope
Envelope Follower	Envelope Tracking	Envelopment
EOX	EPP	EPROM
Equalizer (EQ, EQing)	Equal Temperament	Equipment Rider
Equivalent Input Noise (EIN)	Erase Head	Error Correction
eSATA	ESB	ESD (Electrostatic Discharge)
ESS	Ethernet	Euroblock
Event	Event List	Exciter
Excursion	Expander	Export
ExpressCard	Expression	Extended Surround
Extension	Extension Manager	External Sync