Erica Synths Multimode VCF Assembly Manual

If you are reading this, most probably, you are about to build the
Erica Synths DIY Multimode VCF! It's a multimode filter with a CV
control over cutoff and resonance and simultaneous LP, BP and HP
outputs for serious modular patches. The core of the VCF is highly
stable, custom multimode VCF chip AS3320 (produced in Riga,
btw).
The Multimode VCF kit comes in three versions:
1) Set of 2 PCBs + AS3320 IC + mechanical parts (PCB connectors
and spacer),
2) Set of 2 PCBs + + AS3320 IC + mechanical parts (PCB connectors
and spacer) + panel,
3) Full kit.
FEATURES:
• Simultaneous LP, BP and HP outputs
• CV control over cutoff and resonance
• Cutoff CV attenuverter
• Volume drop compensation, as resonance is increased
• High temperature stability
• Skiff-friendly design
SPECIFICATIONS:
• Audio input amplitude
• CV amplitude (full sweep)
• Panel width
• Module depth
• Power consumption
GUIDE TO ASSEMBLY OF ERICA SYNTHS MULTIMODE VCF
10Vptp
-5V - +5V
10HP
35mm
36mA@+12V, 36mA@-12V
1
2
4
6
8
The big knob makes a difference! This is the
1
filter cutoff frequency control.
2 This is the cutoff CV input
3
This is the resonance CV input
4
Adjust the input signal level with this knob!
This knob adjusts resonance level. The module
has volume drop compensation, so with
5
increasing resonance, the audio volume will not
reduce
6
This is the cutoff CV attenuverter
7
This is the resonance CV attenuator
8
Patch the audio signal here!
9
These are the VCF outputs
3
5
7
9