User Guide

126
Module: Silver
High-pass filter
For the record, the
high-pass filter is the
inverted twin of the
low-pass filter. It al-
lows frequencies above
the cutoff frequency to
pass. Cutting low fre-
quencies makes the
signal sound brighter
and thinner - our ear perceives it to be more strident,
with greater presence. Neuron features a high-pass
filter with a quality of 6 dB. You will find it in the
type filter menu when the filter option special is ac-
tive. (You can also step through all special filters
using the filter button.)
Band-pass
A band-pass filter’s
characteristic curve
resembles the shape of a
bell. Its working
frequency is a center
band, meaning that it
allows frequencies in a
narrow range below and
above this frequency to
pass, cutting all others
outside this frequency band. Though a band-pass filter
actually works with a center frequency rather than a
cutoff frequency, the term "cutoff" is common usage.
The filtering action of a band-pass with a very high
quality - that is, an extremely steep slope - works on
specified narrow frequency bands. Just a very narrow
spectrum is allowed to pass, and setting a high
resonance parameter can boost it. A band-pass’s
sound-shaping properties are much like that of an
acoustic instrument’s body (or housing). Typically,
the housing emphasizes specific frequencies
regardless of the pitch of the played note. This
property is decisive in determining the tone of an
acoustic instrument. These environmental
resonances are called "formants" because they form
the characteristic sound of the instrument. A band-
pass filter with high quality and high resonance is
called a formant filter. It is an outstanding tool for
emulating acoustic instruments (for example,
strings) and the human voice.
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