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Old 1st January 2006, 05:32 PM   #1
tocs100 is offline tocs100  United States
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Default Parametric Q Calculation--help, please

Does anyone own a software program that calculates Q? If I gave you the base octave width and the boost in dB, could you you punch this in and tell me the Q (4 filters, total). I'd really appreciate it: I've come pretty close by hand, but I'd like a super-precise readout!
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Old 1st January 2006, 09:30 PM   #2
tocs100 is offline tocs100  United States
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Oh, I found an online calculator that gave me my Q.

One filter is 700Hz, 0.99 Q. The other is 500Hz, 0.67 Q.

Now, can anyone tell me what value resistors I need to achieve these filters (and gain is something separate, right?)
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Old 2nd January 2006, 05:40 AM   #3
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I have used a gyrator circuit to build EQ sections in my active filter.

You can download the manual here: http://www.delta-audio.com/Active%20filter%20one.htm

In the manual you will find the topology and equations to design your own EQ.

\Jens
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Old 2nd January 2006, 12:21 PM   #4
tocs100 is offline tocs100  United States
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Quote:
Originally posted by JensRasmussen

In the manual you will find the topology and equations to design your own EQ.
Thanks Jens! BTW, have you heard from Tiroth lately? I emailed him about a week ago concerning a new Moxlite purchase: still waiting for reply....
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