Filter Types - Clavia nord lead Owner's Manual

Page 80
As you can see the curve is flat in the low register (which means it doesn't affect this part of the spectrum
at all) and then, at a certain point, gradually starts falling. When applied to the wave above, this filter cuts
away some of the high frequency material in the wave, like this:

Filter Types

There are many types of filters, all with their different purposes. We will here discuss the three most com-
mon, the ones found in the Nord Lead.
Lowpass filter: The Lowpass filter dampens high frequencies and let's low frequencies pass through unaf-
fected, as in the example above. It is the most common synthesizer filter, since it can be used to "round
off" the sharp sound of sawtooth waves and pulse waves.
Amplitude
Highpass Filter: This is the opposite of the lowpass filter. It let's the high frequencies of the sound pass
through and cuts off the low frequencies. This removes "bass" from a sound, without affecting the high
end.
Amplitude
+
Fc (Cutoff Frequency)
Fc (Cutoff Frequency)
=
Frequency
Frequency
About Subtractive Synthesis