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3.10.3
The plugin calculator
Plugins that support custom biquad programming include a basic biquad coefficient calculator. Click on the
Biquad Calculator tab to access it.
The calculator supports single parametric EQ bands, as shown in the above screenshot. To use the calculated
biquad, simply copy the coefficients into the PEQ filter (set to Advanced mode) and click on the Process button.
When calculating a crossover filter, the calculator will produce four biquads for the low pass filter, and four for
the high pass filter. Paste each set into the crossover input screen (set to Advanced mode), and click on the
Process button.
3.10.4
Biquad calculation spreadsheet
The community-developed biquad calculation spreadsheet allows more filter types to be calculated, including
notch filters, Linkwitz transforms, and filters with arbitrary Q-factor. Access this spreadsheet here (requires
Microsoft Excel):
•
http://www.minidsp.com/images/fbfiles/files/All_digital_coefs_v1-20101026.zip
3.10.5
Room EQ Wizard (REW)
Room EQ Wizard is a free acoustic measurement and analysis tool, available for Windows, Mac and Linux
platforms. It includes the ability to automatically generate a bank of parametric EQ biquads based on a
measurement. These coefficients can be saved to a file from REW and loaded directly into a PEQ bank in a
miniDSP plugin.
Room EQ Wizard can be downloaded here:
•
http://www.roomeqwizard.com/#downloads
For guidance on using this feature, please refer to the app note
3.10.6
Active Crossover Designer (ACD)
Active Crossover Designer (ACD) by Charlie Laub performs the complete set of functions for active crossover
design and generates biquad coefficients as its output. Download it here (requires Microsoft Excel):
•
http://audio.claub.net/software/ACD/ACD.html
miniDSP Ltd, Hong Kong /
www.minidsp.com
/ Features and specifications subject to change without prior notice
Auto EQ with
REW.
37
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