analogue solutions
Semblance/4Voice V2
e&oe (c) 21-10-2004
15
RESONANCE
Resonance is a feature of adding feedback to the fi lter circuit. The output of the fi lter
is fed back into the fi lter input. Resonance sets the level of feedback. As the control is
increased to higher levels the fi lter will self-oscillate. The oscillation frequency is set by
the cut-off control.
Use Resonance to alter the tone of the fi lter effect. It can be used to create 'squiggy'
sounds and 'pulse hits'.
CV1/2 MODULATION amount
Turning the control clockwise will increase the amount that CV2 (MIDI controller/
velocity) will modulate the cut-off frequency.
Turning the control anti-clockwise will increase the amount that CV1 (MIDI note/pitch)
will modulate the cut-off frequency.
In a central position CV1 and CV2 will not affect cut-off modulation.
Filter Tracking (of pitch/keyboard note)
This can be achieved using CV1 (pitch) modulation of the fi lter cut-off as described
above.
MODULATION amount
Turning the control clockwise will increase the amount that the modulation source se-
lected 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 modula-
tion.
MOD.SOURCE rotary switch
This selects the modulation source that will affect the fi lter 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
The LFO is used as a modulation source. Use for fi lter 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 fi lter
