Acoustica Mixcraft 7 - Manual (Page 68)

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involves emphasizing frequencies at the filter’s cutoff point. So, if we imagine a filter
with a cutoff frequency of 2000 Hz and a high resonance value, what will be heard
is a sound where frequencies above 2000 Hz have been removed, frequencies below
2000 Hz remain the same, and frequencies at and directly around 2000 Hz are louder.
Resonance is a simple concept, but it can be a dramatic effect, especially if resonance is
high and the filter’s cutoff frequency is changing. This effect is what’s known as a “filter
sweep”.
Every sound in Mixcraft has its own resonant low pass filter. These filters can be used
in many ways. You can use them as an EQ effect, reducing certain high frequencies,
such as acoustic guitar finger squeaks. You can also use them to create filter sweeps, by
adding resonance while the cutoff frequency moves up or down. The cutoff frequency
and resonance amount are each controlled via an envelope, and these values can
change over time, in the same way a volume or pan envelope can be used to change to
volume and pan amount over time.
Editing A Low Pass Filter
To edit a sound’s low pass filter cutoff, go to the toolbar and make sure that “Low Pass
Cutoff” is selected. By default, all points on this envelope are at 100%, meaning that all
sounds below the cutoff (i.e. everything) can be heard. Adding points lower than 100%
will cause high frequencies to be increasingly removed from the audio.
To edit a sound’s low pass filter resonance, go to the toolbar and make sure that “Low
Pass Resonance” is selected. By default, all points on this envelope are at 0%, meaning
that there is no resonance/emphasis at the cutoff point. Adding points higher than 0%
will cause emphasis at the cutoff frequency, if any frequencies exist at and around that
frequency.
What Is A High Pass Filter?
A high pass filter is the exact opposite of a low pass filter, meaning that high
frequencies above the cutoff point are allowed to pass, while frequencies below the
cutoff point are reduced or removed. Mixcraft’s high pass filter is also a resonant filter.
Editing A High Pass Filter
To edit a sound’s high pass filter cutoff, go to the toolbar and make sure that “High Pass
Cutoff” is selected. By default, all points on this envelope are at 0%, meaning that all
sounds above the cutoff (i.e. everything) can be heard. Adding points above 0% will
cause low frequencies to be increasingly removed from the audio.
To edit a sound’s high pass filter resonance, go to the toolbar and make sure that
“High Pass Resonance” is selected. By default, all points on this envelope are at 0%,
meaning that there is no resonance/emphasis at the cutoff point. Adding points higher
than 0% will cause emphasis at the cutoff frequency, if any frequencies exist at and
around that frequency.