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Good Day,
Can I know how bass and treble can be controlled using an op-amp? I have googled for several solutions but it shows some really complex designs which I don't get.
From my understanding, an Active High Pass filter is a treble booster, while an active low pass filter is a bass booster? Is the basics of it that?
Keep googling for the Baxandall tone control circuit. That's the standard solution since 1953. Very elegant, very simple.
The basics of it would be using Two (or Three) Pass Filters (High, Low, Band-Pass for mid range), followed by an amp or control stage, then summed back together at the output.
Some circuits are simple, like the Baxandall, which only uses a op amp to sum the signals back together, while others use an op amp at each frequency, and sum it back with a fourth.
For example:
As for your question From my understanding, an Active High Pass filter is a treble booster, while an active low pass filter is a bass booster? Is the basics of it that?, that is not correct.
A (active or passive) Pass filter only does what it says. It Passes and Filters a signal. A High Pass filter lets High Frequencies through while blocking the rest. A Low Pass does the same for Low Frequencies. And a Band Pass is simply a combination of the two, allowing a mid range of frequencies through. You still need a control or amp stage to boost or cut down those frequencies, and a summing stage to put them back together.
