The history of EQ began in the early 20th century alongside the rise of audio technology. It was mostly utilised in recording and broadcasting studios back then to adjust the audio signals’ frequency response. Bass and treble frequencies were adjusted using basic passive circuitry, like as filters and tone controls, in the early days of EQ.
With the advancement of technology over time, EQ gained sophistication and was able to provide more accurate and adjustable settings. The development of parametric equalisation in the 1950s and 60s gave engineers the ability to modify the filters’ bandwidth, or “Q,” as well as their frequency and amplitude. This made it possible to produce audio with more accurate tweaks and fine tweaking.
Since then, EQ has emerged as a vital instrument in a variety of audio fields, including live sound, post-production for films, and music creation. EQ capabilities increased even further with the introduction of digital audio technology, providing a wide range of filter types, adjustable curves, and real-time analysis tools.
One of the more recent advancements in EQ technology is Dynamic EQ, which marries dynamic processing with traditional EQ principles. This dynamic adaptation to audio characteristics provides enhanced control over frequency balance, particularly beneficial in scenarios involving dynamic audio content such as music recordings or live performances.
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Rumsey, Francis, and Tim McCormick. “Sound and Recording: Applications and Theory.” Focal Press, 2014.
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