Dreadbox Erebus Owner's Manual
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Dreadbox Erebus Owner's Manual

Analog paraphonic synthesizer
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1. Quick Start
1.1
Box Contents
1.2
Schematic Diagram
1.3
Connections
1.4
Powering up Erebus
2. Operation
2.1
Paraphony
2.2
Midi Interface
2.3
Oscillators
2.4
Filter
2.5
Amplifier
2.6
Envelope
2.7
LFO
2.8
Lo-Fi Echo
2.9
Patching
2.10 Eurorack

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Summary of Contents for Dreadbox Erebus

  • Page 1 1. Quick Start Box Contents Schematic Diagram Connections Powering up Erebus 2. Operation Paraphony Midi Interface Oscillators Filter Amplifier Envelope Lo-Fi Echo Patching 2.10 Eurorack...
  • Page 2 1. Quick Start 1.1 Box Contents Erebus Analog Synthesizer, 42HP case, 1x Midi DIN5 to 3.5mm adapter type A, 1x Ribbon cable for Eurorack Connection. 1.2 Schematic Diagram HARD SYNC...
  • Page 3 1.4 Powering up the Erebus In order to power the Erebus sufficiently, use a good quality USB power adapter with minimum 1A and a good quality USB A cable. The USB adapter nor the USB A cable are included in the box.
  • Page 4 2.3 Oscillators The EREBUS oscillators need about 2 to 3 minutes to warm up. You can just turn on the synth and play, but the tuning will change during that time. They work with the classic 1V/Oct controllers or a Midi source.
  • Page 5 Oscillator that is ON will always be added to the Filter. 2.4 Filter The filter of the EREBUS is a 2-pole 12db/octave pre-fed resonating Low Pass Filter. Pre-fed means that it has a build in pre-resonant accent that it is always active on the 1/6th of the filter’s total input gain and completely...
  • Page 6 2.6 Envelope EREBUS’s ADSR is dedicated to the Filter at all times. It may deliver up to 5V of envelope (also accessible on a patch). 1. Attack speed 2. Decay speed 3. Sustain point 4. Release speed 5. Envelope’s amount to Filter 2.7 LFO...
  • Page 7 2.9 Patching EREBUS’s right side is dedicated to patching. Learning to patch needs lots of experimentation. We strongly suggest spending lots of time and trying as much connections as possible. You will find out that half the possibilities of the synth comes from it. Patching is divided in 3 areas: OUTPUTS - those patches only send voltage.
  • Page 8 Best operated at 1V/Oct. Max +/-12V ECHO: Controls the echo’s time. Best operated at 0-2,5V. Max +/-5V GATE: Controls the envelope’s on-off. The EREBUS gate is different from common gate controls because the ADSR envelope works in an on/off function but the amp’s envelope has a logarithmic opening function.

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