miniDSP Flex Eight - FIR Filtering; FIR Filtering Overview and Pane

3/15/23, 9:47 AM
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FIR Filtering
FIR ltering is a powerful and advanced feature . It allows construction of complex arbitrary equalization and
crossover lters with independent control of amplitude and phase.
FIR ltering overview
FIR ("nite impulse response") ltering differs from the IIR ("innite impulse response") lters used in the PEQ and
crossover blocks. Technically speaking, IIR lters are recursive, meaning that each output value is partially calculated
from earlier output values as well as from input values. While an IIR lter requires only a fairly small of values to be
specied, an FIR lter is specied by a large array of numbers.
FIR ltering allows very complex lters to be constructed, with the aid of suitable design software. These lters can
correct for amplitude only ("linear phase lters"), phase only, or a combination or both.
These numbers are conventionally referred to as "taps." The miniDSPFlexEight can compute a total of 4096 taps.
The FIR lter pane
Each input channel has an FIR lter bank with a variable number of taps. Click on the FIR button to open the FIR lter
settings window: