
Chapter 7: Preset Programming 85
PRESET PROGRAMMING
A filter that lets only the high frequencies pass is called a High Pass
Filter.
A filter which only lets a certain band of frequencies pass is called a
Bandpass Filter.
WHAT IS A FILTER?
Most of the instruments in Morpheus are complex waves containing
many sine waves of various amplitudes and frequencies. A filter is a
device which allows us to remove certain components of a sound
depending on its frequency. For example, a Low Pass Filter lets the
low frequencies pass and removes only the high frequencies.
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Frequency
...
Amplitude
Output of Filter
Low Pass
Filter
Cutoff Frequency
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Frequency
...
Amplitude
Filter Output
Initial Frequency
High Pass
Filter
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Frequency
...
Amplitude
Center Frequency
Filter
Output
Band Pass
Filter
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