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Help me analyze this EQ circuit
- Thread starter rpschultz
- Start date
I have LTSpice modeled the circuit from post #1, added a volume pot at the end. With the gain/vol pots a zero and EQ pots straight up it gives 0db with the HPF.
What I'd like to do is modify the mid to be a 3 knob (gain, freq, Q). I have 2 circuits I'm looking at but struggling to make sense of them: first one is Steve Dove's Designing a Professional Mixing Console, some consider the original bible for this sort of thing. What a wealth of info. Looking at the MID band connected to MF1 (lower right), both the freq and Q have dual pots, and I understand how to adjust the frequency range.
2nd example is from BYOC Parametric EQ. Looking at schematic for that one, the MID looks like this. It only has a dual freq pot and a single Q. But it has 4 op amps compared to the Steve Dove has 3.
Trying to make sense of this and understand what would be good or better.
What I'd like to do is modify the mid to be a 3 knob (gain, freq, Q). I have 2 circuits I'm looking at but struggling to make sense of them: first one is Steve Dove's Designing a Professional Mixing Console, some consider the original bible for this sort of thing. What a wealth of info. Looking at the MID band connected to MF1 (lower right), both the freq and Q have dual pots, and I understand how to adjust the frequency range.
2nd example is from BYOC Parametric EQ. Looking at schematic for that one, the MID looks like this. It only has a dual freq pot and a single Q. But it has 4 op amps compared to the Steve Dove has 3.
Trying to make sense of this and understand what would be good or better.
This will help you.
https://sound-au.com/articles/state-variable.htm#ref
https://en.wikipedia.org/wiki/State_variable_filter
https://sound-au.com/articles/state-variable.htm#ref
https://en.wikipedia.org/wiki/State_variable_filter
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