AER Colourizer 2, User Manual

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5.4.2 Enhancer
The enhancer built into the colourizer 2 adds harmonics to the
source signal thereby creating more brilliance and clarity.
The enhancer level can be adjusted with the intensity control.
Pressing the off/on switch will deactivate or activate the
enhancer.
5.4.3 Equalizer
The equalizer is a parametric filter network, adjustable from
90 Hz to 11 kHz in two ranges:
f1= 90 Hz – 1,6 kHz and
f2= 680 Hz – 11 kHz.
The ranges have been designed to meet the special require-
ments of acoustic instruments, microphones and other signal
sources and to allow useful and accurate signal manipulation in
order to suppress resonances and feedback. The filter technology
ensures a constant bandwidth at any selected frequency.
Note:
A parametric equalizer is a filter network where all
features of a filter (amplitude, i.e. boost or cut = level,
frequency and Q-factor = bandwidth) can be adjusted.
Parametric means that not only the boost/cut, but also the
location and width of the frequency bands can be adjusted. It
offers the possibility to equalize (flatten) notches or peaks in the
frequency response (hence the name equalizer) and to suppress
feed-backs or resonant peaks. It can also be used as a flexible
tone control for targeted sound alterations.
Sample application:
Suppose you notice an excessive signal increase (feedback).
To counteract you will need to reduce the signal level of the
corresponding frequency range.
To do this, first set the level control (amplitude)
to maximum cut (left-hand stop).
Make sure that the bandwidth control is set to
maximum band-width (right-hand stop).
Using the frequency control you can now detect the centre
frequency of the offending frequency range.
(use the f1/f2 preselect switch also)
The peak should now be gone. To enhance the sonic result, you
may reduce the bandwidth (increase the Q-factor)
or lower the amplitude (decrease the reduction), if necessary.
5.4.4 Frequency poti-rotation
poti-position rotation 300° f1 f2
lefthand stop 0,00% 55 Hz 600 Hz
50,0 % 100 Hz 1,3 KHz
75,0 % 180 Hz 2,3 KHz
87,50 % 300 Hz 3,7 KHz
93,00 % 455 Hz 5,6 KHz
righthand stop 100,00 % 870 Hz 11 KHz
5.4.5 Bandwidth poti-rotation
poti-position rotation 300° octave
lefthand stop 0,0% 1/6
12,5% 1/3
25 % 1/250
50 % 2/3
righthand stop 100% 1
balance
Le
ve
l
max
min
mid
Centerposition
balance
in
tensit
y
min
mid
max
Left position
Right position
in
tensit
y
min
mid
max
balance