miniDSP Flex Eight - Biquad Design Software for Crossovers

3/15/23, 9:47 AM
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Setting biquads for the crossover block
Paste the coecients into the text box, then click on the PROCESS AND APPLY button for them to take effect.
Biquad Programming
PROCESS AND APPLY
BASIC MODE ADVANCED MODE
biquad1,
b0=0.998191200483864,
b1=-1.9950521500467384,
b2=0.996920046761057,
a1=1.9950521500467384,
a2=-0.9951112472449212,
biquad2,
b0=0.999640139948623,
Switching between basic and advanced mode does not convert between Frequency/Filter type and biquad parameters.
The basic parameters and advanced biquad coecients for each lter are stored independently and the selected set is
used for processing.
Biquad design software
Following are programs that can be used to design your biquad coecients. The design program must be set for a 96
kHz sample rate.
Biquad calculation spreadsheet
The community-developed biquad calculation spreadsheet allows many lter types to be calculated, including notch
lters, Linkwitz transforms, and lters with arbitrary Q-factor. Access this spreadsheet here (requires Microsoft Excel):
Download zipped spreadsheet from miniDSP.com
(https://www.minidsp.com/images/fbles/les/All_digital_coefs_v1-20101026.zip)
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
coecients can be saved to a le from REW and loaded using the DeviceConsole. Room EQ Wizard can be
downloaded from:
Room EQ Wizard downloads (https://www.roomeqwizard.com/#downloads)
For guidance on using this feature, refer to the app note Auto EQ with Room EQ Wizard
(https://www.minidsp.com/applications/rew/rew-autoeq-step-by-step) .
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