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9
Spectralizer
FREQUENCY sets the starting frequency of the highpass filter.
Above this frequency second and third harmonics are being
generated. The highpass filter can be varied between 1kHz
and 7kHz in steps of 500Hz.
M
IX controls the mix level between the processed and the
unprocessed signal. The control range is 0% to 100%. The M
IX
encoder is equipped with an „alpha-dial“ logic. Turning the
encoder rapidly causes the values to jump in steps of 10,
whereas turning the encoder slowly causes the values to
proceed in single increment steps.
Ex
ample: All controls are set to the starting position:
I
NPUT GAIN 0; FREQUENCY 1k; DENSITY 0; 2ND HARMONIC 0%;
3
RD HARMONIC 0%; MIX 0%.
Turn the M
IX to 50%. You will hear an increase in high
frequencies above 1kHz due to the starting position of the
F
REQUENCY control. Until now you have not yet added any
harmonics. The increase in high frequencies is a boost of all
frequencies above 1kHz. You can change the starting frequency
by turning the F
REQUENCY encoder clockwise to higher frequen-
cies. For some applications this may already do the job.
To add harmonics set 2ND HARMONIC to 50% and 3RD
HARMONIC to 30%. If the audible effect is very subtle increase
the D
ENSITY setting to 1 or 2 (details see DENSITY, 7).
The 2
ND HARMONIC encoder controls the intensity of the
added second harmonics which are being generated above the
adjusted highpass frequency (see F
REQUENCY, 3).
The second harmonics are even harmonics which bring a soft
and silky top-end to the sound. In comparison to odd harmo-
nics, even harmonics do not contain as much brightness and
they also do sound softer.
Control Elements
Mix
4
2nd Harmonic
5
Frequency
3
Diagram 2:
2
ND HARMONIC
The illustration shows the
FFT spectrums of the even
harmonics for a measuring
signal of 3kHz.