Analogue Solutions Telemark /-K - Manual (Page 10)

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analogue Solution – Telemark – 2014 10 | P a g e
Voltage Controlled Filter VCF
The voltage controlled filter (VCF) is used to alter the tone of the VCOs/Noise and is the heart of what gives
an analogue synth its character.
There are 4 types of filter available;
Low Pass
High Pass
Band Pass
Notch Pass (variable between Low/High)
 - Frequency
This sets the cut-off frequency, the point at which
the VCF will start to filter-out harmonics.
 - Resonance
Resonance is a feature of adding feedback to the
filter circuit. The output of the filter is fed back
into the filter input. Resonance sets the level of
feedback. As the control is increased to higher
levels the filter will self-oscillate. The oscillation
frequency is set by the frequency control. Use
Resonance to alter the tone of the filter effect. It
can be used to create squidgy sounds and pulse
hits
 - Modulation Amount
Turning the control clockwise will increase the
amount that the modulation source selected by
the MOD.SOURCE switch (outlined below) will
modulate the cut-off frequency. Turning the
control anti-clockwise works just like clockwise
except that the modulation signal is inverted
(negative). In a central position the selected
modulation source will not affect cut-off
modulation.
- Notch
This sets the relative mix between the low pass
and high pass filters that is fed to the Filter Type
selection switch (6) Notch position.
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- MOD SOURCE rotary switch
This selects the modulation source that will affect the
filter cut-off and is routed to the control above.
There are 4 modulation sources;
EG1 EG1 is used as a modulation source. Use for
tonal changes.
LFO LFO is used as a modulation source. Use for
filter sweeps (wah-wah).
VCO2 Pulse wave of VCO2 is used as a modulation
source. Use for effects.
EXT2 Signal at the EXT2 socket is used as a mod
source. Use for external filter control.
Cont…
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