I'm not sure I fully understand the latest question.
Ethan's article is correct for the reasons Roy mentions above.
Within an analog eq the signal is essentially split into two. One of those signals is delayed slightly and recombined with the other. This causes the phase change within the eq. Depending on how the two signals are combined results in a particular frequency being boosted, or cut.
Depending on the design of the analog eq, the physical components resposible for the delay [that ultimately creates the eq cut or boost] are likely to be a capacitor, a resistor and an inductor. If you want to learn more about this, search for analog filter design, or RC networks (Resistor-Capacitor) networks.
This is quite a deep dive, but for anyone genuinely interested:
Couple of good resources:
The Open Source Book - Lessons In Electric Circuits - Volume II AC by By Tony R. Kuphaldt
The section on filters is Chapter 8 in volume 2.
https://www.ibiblio.org/kuphaldt/electricCircuits/
More expensive would be the book called the Art Of Electronics by Paul Horowitz and Winfield Hill. Yes, quite expensive, but you might get lucky on a 2nd hand copy on Amazon for example.
Cheers!
Edit: And of course, for the professional angle on how phase issues relates to mixing, buy the latest edition Mike Senior's book Mixing Secrets For The Small Studio
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Ethan's article is correct for the reasons Roy mentions above.
Within an analog eq the signal is essentially split into two. One of those signals is delayed slightly and recombined with the other. This causes the phase change within the eq. Depending on how the two signals are combined results in a particular frequency being boosted, or cut.
Depending on the design of the analog eq, the physical components resposible for the delay [that ultimately creates the eq cut or boost] are likely to be a capacitor, a resistor and an inductor. If you want to learn more about this, search for analog filter design, or RC networks (Resistor-Capacitor) networks.
This is quite a deep dive, but for anyone genuinely interested:
Couple of good resources:
The Open Source Book - Lessons In Electric Circuits - Volume II AC by By Tony R. Kuphaldt
The section on filters is Chapter 8 in volume 2.
https://www.ibiblio.org/kuphaldt/electricCircuits/
More expensive would be the book called the Art Of Electronics by Paul Horowitz and Winfield Hill. Yes, quite expensive, but you might get lucky on a 2nd hand copy on Amazon for example.
Cheers!
Edit: And of course, for the professional angle on how phase issues relates to mixing, buy the latest edition Mike Senior's book Mixing Secrets For The Small Studio
.
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