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ARTURIA – MOOG MODULAR V – USER’S MANUAL
signifies that it is not tuned to the same tonality!) The higher you tune oscillator2, the more you
will obtain composite waveforms.
The complete cycle of a wave form (sawtooth) = one period
In the image above, oscillator2 is synchronized with the first, and then tuned to a frequency with
double the tonality.
•
The
noise
module
The noise signal spectrum possesses all frequencies at the same volume. For this reason, the noise
module is used to create different noises like the imitation of wind or a breath, or even special ef-
fects. White noise is the richest of noises. Pink noise is also commonly present on synthesizers. It is
not as rich in high frequencies as white noise, having received a low pass filtering.
Also, note that the audio output of the noise can be used as a modulation signal (specially when it is
heavily filtered) to create random cyclic variations.
On pre-cabled synthesizers, the noise module is either integrated into the oscillator, (its audio out-
put being placed as a complement on top of the wave form outputs) or the mixer directing the sig-
nals to the filter. On the other hand, on modular synthesizers, it is an independent module.
6.1.2
The filter or VCF
The audio signal generated by an oscillator (the wave form) is generally then directed towards a
filter module (Voltage Controlled Filter). It is this module that allows the modeling of the sound by
filtering (by subtraction, explaining the name of this type of synthesis) the harmonics situated
around a cut-off frequency. It can be considered like a sophisticated equalizer, which reduces, de-
pending on the case, the low or high frequencies of a sound.
The removal of unwanted frequencies from a cut-off frequency is not sudden, but is done progres-
sively, depending on the filter slope. This filter slope is expressed in dB/octave. The filters used in
classic analog synthesizers have slopes of dB/Oct. or de 12 dB/Oct.
Summary of Contents for Moog Modular V
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