Erica Synths Fusion VCO Manual

Erica Synths Ikke kategoriseret Fusion VCO

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ERICA FUSION VCO

AUDIO IN 1V/OCTSUBMIX CV FM IN WAVE CV VCO OUT MIX OUT

-2-1

FUSION VCO

THANK YOU FOR ORDERING

ERICA FUSION VCO MODULE!

The Erica Synths Fusion series modules

are designed combining vacuum

tubes and semiconductors therefore

they bring warm, powerful sound and

overdrive possibilities of vacuum tubes

into your modular system. Erica Fusion

series consist of range of modules

used in sound shaping circuit – VCO,

Mixer, real Ringmodulator using

audio transformers and germanium

diode ring, VCF, VCA and Analogue

Delay/Chorus.

Conventional wisdom says that

vacuum tubes have nonlinear

characteristics, and therefore VCOs

based on vacuum tubes need special

tuning for each note.

Erica Synths Fusion VCO is special

kind of VCO – it fuses good tuning

of digital VCO with warm, unique

sound of vacuum tubes that work in

suboscillator circuit. The module has to

vacuum tube based suboscillators: -1

and -2 octaves with plenty of mixing

opportunities for amazing sonic results.

If you wish to go really low frequencies

and have a sound that sets your

modular system apart from mass –

this is exactly module, you need!

FEATURES:

3 basic waveforms with VC morphing

Good 1V/oct tuning

Vacuum tube based suboscillators -1 and -2 oct

Manually and CV controlled -1/-2 oct mixing

Adjustable suboscillator waveshape

Dry/Wet (VCO/suboscillators) mixing

Passive Lowpass ﬁlter for extreme subbass sound

Audio input

TECHNICAL SPECIFICATIONS:

Audio input level: up to 20V ptp .....................................................................................................

VCO range: C1 – C8 .........................................................................................................................

Max Output level: 10V ptp ...............................................................................................................

Panel width: ............................................................................................................................ 24HP

Module depth: 35mm .....................................................................................................................

Power supply: bipolar +-12V , eurorack standard and/or Erica Synths 6VAC PSU .................

Power consumption:

Tube heater PSU conﬁguration: 60mA@+12V, 30mA@-12V, 300mA@6VAC ..........................

Eurorack PSU conﬁguration: ..........................................................215mA@+12V, 185mA@-12V

(NB – start-up power consumption for few seconds is +-250mA)

Choose one of principal

waveforms of VCO

Set the VCO frequency

manually

Dry/Wet potentiometer

provides smooth mix between

pure VCO and pure tube

suboscillator sound

Use COLOUR potentiometer

to ﬁlter o higher harmonics

for extreme bass sound and

almost pure sine waveform

on the output. Full CCW

setting works best at really

low frequencies –

C1 and below

Adjust -1 octave

suboscillator waverofm from

more harmonic rich CW to

almost sine CCW

Adjust a mix between

-1 octave and -2 octaves

suboscillators

Connect 1V/oct

signal to control

VCO frequency

Apply CV to fade

between -1oct

and -2oct mix

Patch

FM CV

here

Apply wave

morphing CV here.

It will be added

to waveshape

potentiometer

setting

This is dry VCO

output, no

suboscillator is

added

This is master output. Get

that fat tube sound here

Adjust -2 octave

suboscillator waverofm from

more harmonic rich CW to

almost sine CCW

Use waveshape

potentiometer to

morph/adjust waveforms.

12 ‘o’clock setting gives

you waveform, selected

by the switch, and then

morphing is applied:

• Sine morphs from

logarythmic wave to

overdriven sine

• Triangle morphs from

ramp to sawtooth

• Pule has adjustable PW –

from 5% to 95%

Patch external VCO (simple

waveforms will work best)

to route it to suboscillator

circuit. Internal VCO will be

automatically disconnected

Adjust FM level with this

potentiometer

ERICA FUSION VCO

You can conﬁgure Erica Fusion modules for two PSU options.

1. When used with easy to install 6VAC Erica Tube heater PSU, Fusion modules have 60mA@+12V and 30mA@-12V power consumption from

eurorack PSU. Erica Fusion 6VAC PSU is designed to power up to 7 Erica Fusion modules, but your eurorack case needs 220VAC or 110VAC

routed inside the case (this is typical for most Doepfer cases and some other producers that use switching PSU). Latest Erica Synths cases

have Fusion tube heater connectors on integrated PSU boards. For Tube heater PSU connection refer next page.

2. When conﬁgured to work with standard +-12V eurorack PSU, power consumption is 215mA@+12V and 185mA@-12V, and you do not need to

install Fusion PSU. This conﬁguration is the best for Make Noise and similar PSU systems that route only +12V in the case and use switching ICs

to generate +-12V.

For +-12V operation install 2 jumpers

on the Fusion PSU connector on the

left side as shown on the silkscreen.

For 6VAC operation from the Fusion

PSU, install jumpers on the right side.

Also, you can refer to small 12V or 6V

notes next to jumpers.

For +-12V operation install 2 jumpers

on the Fusion PSU connector on the

left side as shown on the silkscreen.

For 6VAC operation from the Fusion

PSU, install jumpers on the right side.

Also, you can refer to small 12V or 6V

notes next to jumpers.

ERICA FUSION VCO MODULE comes 1V/oct calibrated, but PSUs on modular synths are so dierent, therefore, if needed, you can perform the

calibration procedure speciﬁcally for your modular setup. We have introduced two step calibration where you will need precise 5,000V and 1,000V CV

source (you can use midi-cv keyboard with 5 octaves range). To perform a calibration procedure, follow these steps:

1. Disconnect your Fusion VCO from the PSU.

2. Connect a patch cable to the CV source and make sure, you get 1,000V (exactly ONE VOLT) on the output – you can play C1 on the midi-cv keyboard.

3. Turn both WAVE and TUNE knobs all way clockwise and ﬂip both switches up (BANK1 and VCO position). Then connect the VCO to the PSU on your

modular! Output LED will light on.

4. Connect 1,000V patch cable to 1V/oct input of the Fusion VCO!

5. Flip VCO/LFO switch down to LFO position to initiate the calibration step 1!

6. Now set the CV source to 5,000V (exactly ﬁve volts) – you can play C5 on the midi-cv keyboard.

7. Flip VCO/LFO switch up to VCO position to initiate the calibration step 2!

8. Output LED will blink once, and this means that you have successfully calibrated the VCO!

Produkt Specifikationer

Mærke:	Erica Synths
Kategori:	Ikke kategoriseret
Model:	Fusion VCO

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