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> Math Expression For Parametric Eq, Looking for math expression for UREI546
Posted: November 21, 2011 11:35 am
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Hi, I would like to clone UREI 546 parametric EQ, but I like to modify the number of bands and the frequencies. I found expressions of active filters, but these things not really good for this schematic. Somebody can help me, how to count the values of capacitors, resistors, and potentiometers for any from-to frequencies? The original schematic of URE546 filter is here:

user posted image

The values in the original device:
user posted image

for this setup:
user posted image

If somebody know the expression please help me. Thanks.
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