Clavia Nord Modular & Micro Modular V3 [204/232] The filter

Clavia Nord Modular & Micro Modular V3 [204/232] The filter
8. Synthesis basics: Subtractive synthesis NORD MODULAR V3.0
Page 196
pitch of the synchronized oscillator (Oscillator 2), this will be perceived as a change in timbre, rather than
in pitch. This leads to a spectrum with deep resonance in Oscillator 2s harmonics, like this:
If you go even further and let the pitch of the synchronized oscillator vary continuously, for example from
an LFO or envelope, you will change the harmonic content of the sound in an interesting and very char-
acteristic way.
T
TT
T
H
HH
HE
EE
E
F
F F
F
I
II
IL
LL
LT
TT
TE
EE
ER
RR
R
The filter in a synthesizer is used to remove or emphasize frequencies in a frequency spectrum. A filter is
a bit like an amplifier (a volume control) that is applied differently to different parts of the spectrum. For
example, a filter might make low frequencies louder, while at the same time making high frequencies
weaker. Applying such a filter would make a sound have more bass and less treble.
Lets imagine a sound with a spectrum where all harmonics are available at equal levels. It would look like
this:
Lets now put this spectrum through a lowpass filter (this type of filter is discussed in more detail below).
The filter has a characteristic, which can be shown as a curve in a frequency spectrum.
10 20 30 40
Amplitude
Harmonic number
(Frequency)
Osc 2 Harmonics
Amplitude
Frequency
Amplitude
Frequency

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