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 ("innite 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
specied, an FIR lter is specied 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 miniDSPFlex can compute a total of 4096 taps.
The FIR lter pane
Each output channel has an FIR lter bank with a variable number of taps. Click on the FIR button to open the FIR lter
settings window:
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