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versed to the brightness of the LED. Also select the other waveforms with [wave]-switch (23) and
repeat the procedure. Experiment with the [speed]-knob (24). You will recognice the approx.
doubled frequency, when saw-waves are selected.
26.
Move the [balance]-knob (41) to 12 o'clock in order to make both filters audible. When both
[modulation]-knobs (14) and (35) are moved into the same direction, both cutoff frequencies
oscillate up and down in phase. If and [modulation]-knob is moved clockwise and the other one
counter clockwise, the cutoff frequencies oscillate out of phase resp. one filter closes while the
other one opens and vice versa. This is best audible with low LFO frequencies.
10.6.2 S&H
Recall the basic setting ([bypass] to "ON"). Move [frequency]-knob (7) and (28) back to 1 o'clock positi-
on, both [resonance]-knobs (8) and (37) to 12 o'clock, [speed]-knob (24) to 12 o'clock, both [vcf-mod1]-
switches (15) and (36) in position "S&H" (up), the [wave]-switch (23) to sawtooth (center), both [reso-
mod1]-switches (13) and (34) in position "S&H" (down), [gate]-switch (21) in position "LFO" (center)
and the [source]-switch (22) in position "RAND" (right).
The S&H unit is now triggered by the LFO and samples a random voltage.
27.
At first move the [modulation]-knob (14) clockwise to 3 o'clock. A randomly 'tootling' cutoff fre-
quency is audible. Move the [modulation]-knob (12) to 4 o'clock – the resonance becomes
stronger at high cutoffs, sometimes the filter starts to self-oscillate. Towards low cutoffs, the re-
sonance is attenuated. Now move the [modulation]-knob (12) to 8 o'clock: Resonance becomes
stronger at low cutoffs and vice versa.
28.
Equal results will be achieved, when the [modulation]-knob (14) is moved clockwise to the
9 o'clock position and the [modulation]-knob (12) is on 8 o'clock: Resonances become stronger
at high cutoff frequencies. With [modulation]-knob (12) at 4 o'clock, the process is inverted.
29.
Proceed with VCF 2, by moving the [balance]-knob (41) to fully cclockwise position.
10.6.3 The dynamic-function (follower)
Recall the basic setting ([bypass] to "ON"), both [frequency]-knobs (7) and (28) to 12 o'clock, both [re-
sonance]-knobs (8) and (37) to 1 o'clock, the [dynamic]-switch (20) in position "LIN" (left), both [vcf-
mod1]-switches (15) and (36) in position "DYN" (down) and the [modulation]-knobs (14) and (35) to
fully clockwise position.
30.
Move the [level]-knob (1) clockwise. VCF 1 should be fully opened not later than at fully clockwi-
se position. If not, increase the level of your sound source or switch the [GAIN]-switch (22) to
"+20 db". Since the [compression]-knob (3) is in center position, you will not recognice a change
in volume, while you move the [level]-knob. The filter is now opened and closed lineary, depen-
ding on the input level.
31.
Move the [dynamic]-switch (20) to position "LOG", [level]-knob (1) clockwise and move the [mo-
dulation]-knob (14) back, until the filter is just opened. Now move the [level]-knob (1) slowly
counter clockwise and back. You will notice, that the filter now closes slower and softer as in
"LIN" position of the [dynamic]-switch (20).
32.
Move both [frequency]-knobs (7) and (28) to 3 o'lock, [modulation]-knob (14) and (35) to fully
counter clockwise position and the [dynamic]-switch (20) at first back to "LIN" position. The filter
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