Lil' Erebus Dreadbox User manual

CUT OFF
TUNE
NAME
ECHO TIME
RESONANCE
LVL1 (VCO’S)
VCO2 (VCO’S)
LVL2 (VCO’S)
D (ENVELOPE)
A (ENVELOPE)
LVL (ENVELOPE)
S (ENVELOPE)
MIX (ECHO/AMP)
MASTER (ECHO/AMP)
FEED (ECHO/AMP)
TRIANGLE (LFO)
RATE (LFO)
FILTER CUT OFF FREQUENCY
ECHO TIME. ABOVE 50% DELAY GETS DIRTY
FILTER FEEDBACK CONTROL
VCO1 LEVEL
VCO2 TUNING
VCO2 LEVEL
ENVELOPE DECAY AND RELEASE TIME
ENVELOPE ATTACK TIME
ENVELOPE LEVEL (HARD-WIRED WITH CUT OFF)
ENVELOPE SUSTAIN LEVEL
BLEND BETWEEN CLEAN SOUND AND DELAYED
MASTER LEVEL OF THE SYNTH
NUMBER OF ECHO REPEATS
LFO SQUARE WAVE OUT
LFO RATE ( 2SEC UP TO ABOUT 8 HZ)
FUNCTION
PITCH CONTROL FOR BOTH VCO
SQUARE (LFO) LFO SQUARE WAVE OUT
POTENTIOMETERS / SLIDERS
USER’S MANUAL

USER’S MANUAL
PATCH POINTS
GATE IN
NAME
GATE OUT
CV OUT
CV2
MIDI IN
PW2
CUT
AUDIO
VCA
ENV
TIME
CV
OUT
SQU
TRI
CV IN
CV OUT
CV OUT
CV IN
MIDI
CV IN
CV IN
SIGNAL
CV IN
CV OUT
CV IN
CV IN
SIGNAL
CV OUT
CV OUT
GATE INPUT (0V - 5V PULSE)
MIDI TO GATE OUT (0V - 5V PULSE)
MIDI TO CV OUT ( 1V/OCV - 5 OCTAVES RANGE)
PITCH CONTROL FOR VCO 2
MIDI INPUT. USE THE PROVIDED CABLE
PULSE WIDTH CONTROL FOR VCO2
CONTROL INPUT FOR THE CUT OFF. (0V - 5V )
SIGNAL INPUT (TO FILTER)
VCA LEVEL INPUT. CANCELS INTERNAL TRIGGER
ENVELOPE OUTPUT
DELAY TIME CONTROL (0V - 5V)
LFO RATE CONTROL
MASTER OUTPUT
LFO SQUARE WAVE OUT (10V PP)
LFO TRIANGLE WAVE OUT (6 V PP)
TYPE FUNCTION
CV IN CV IN PITCH CONTROL FOR BOTH VCOs

USER’S MANUAL
MIDI TO CV
Lil’ Erebus has a very simple midi to cv convertor:
-midi notes to cv (1v/ocv - 5 octaves range from 0V to 5V)
-midi trigger to gate (0V - 5V pulse)
-channels from OMNI up to 7
-can be used as a duophonic or monophonic device
-can be polychained up to 2 Lil’ Erebus
The 4 channel DIP switch located on the back ,is responsible for the channel selection,
play mode and polychain. To set on which polychain order the unit is, during the first 5 sec that
you power the module, turn DIP4 on-off at least 3 times.
DIP SWITCH
2
4
3
1 3 42
1 OO
O O
I
I
O
O O O
O O
I
I
OI
OI I
I I I
I
I
X
X
X
X
X
X
X
X
OX X X
X X X I
6
OMNI
MONO
DUOPHONIC
7
5
CHANNEL
CHANNEL
CHANNEL
CHANNEL
CHANNEL
CHANNEL
CHANNEL
X = does not matter
I = ON
O = OFF

USER’S MANUAL
FAQ:
Is Lil’ Erebus identical to the V2?
-No, this is a workalike but not an identical circuit. It would be very
difficult to make a DIY project of the V2 that would allow an average
DIYer with low soldering skills to successfully complete it
My Lil’ Erebus play in duophony only when i hit 3 notes.
-Your synth is set to a polychain mode. To set on which polychain
order the unit is, during the first 5 sec that you power the module,
turn DIP4 on-off at least 3 times.
My Lil’ Erebus is out of tune.
-Follow the tuning procedure after a 35 min warm up
When I patch something to the VCA , i get no sound
-The VCA needs at least 3,5V so as the synth starts producing sound
My envelope generator is slow
-The module has the exact same envelope as the V2 erebus did.
This envelope is slow in general. But if you still think you do not get
the correct result, check if the optional capacitor 470n is placed.
If it is, just remove it. Additionally, you can reduce the envelope
capacitor (check the board on the construction manual) to a lower value.
TUNING AND STABILITY
Lil’ Erebus needs at least 20 min of warm up until the oscillators are stable.
If your module is out of tune, leave it to warm up for 35 min and
follow the calibration procedure described on the constraction manual.