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A Matrix-filter, such as this,
is a FIR-Filter where you can enter the coefficients yourself, e.g. if
you have designed them with an other program.
With the matrix you can simulate various Filtercharacteristica. If you
want to get e.g. a highpass-filter, just set the first value to e.g. 5
and the next ones till cut-off to -1 (e.g. if cut-off=7, then the next
six values).
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