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DateAutorwhat
May 9.  2018LED-manDDRM 2.0 guide initial
Oct 25. 2018LED-manBOM added




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Deckard's Dream Synthesizer

Hi all, this is the place to find the latest building documents for Black Corporation's Deckard's Dream polyphonic synthesizer.

Currently, this project is at rev 1.0, PCB's are currently being released to builders. (18.Oct. 2017) and are being constructed.

A new PCB version rev. 2.1 is planned and the release is planned for July 2018, this page is only for rev.2.x

Product Info:

the Deckard's Dream product is available as Build to order and DIY KIT Version, both released in 2017.

Its also known or coined as the "DDRM".

The difference in the DIY KIT and assembled (Build to order) are:

  • the component format, the DIY KIT is mostly THT, the build to order synth is mostly in SMT.
  • The case size is not as deep for the build to order as it is for the DIY.

Note: Although the DIY has most of the SMT devices pre-installed onto the PCBs, there are over 675 SMT decoupling capacitors (0805) and one small (SOIC8) power switch device that MUST be installed by the builder, in addition to the through hole components

A addional 1U expander is planned - release in 2018

Examples of Presets and voices: https://soundcloud.com/deckardsdream


Technical Specs:

 Click here to expand...


Synthesizer features

  • 8-voice polyphonic analogue synthesizer
  • Fully analogue signal path
  • 2 synthesis layers per voice
  • 256 presets

Layer architecture

  • VCO with square, saw and sine waveforms
  • PWM with sine-wave LFO
  • Manual PW (50-90%)
  • 12dB HP and LP discrete filters with separate resonance controls
  • ADSR filter envelope with adjustable initial and attack levels
  • ADSR VCA envelope
  • Velocity and aftertouch controls for filter brilliance and volume levels

Master controls

  • Global coarse/fine tune
  • VCO2 detune
  • LFO with sine, saw, ramp, square and stepped random waveforms
  • LFO destinations: VCO, VCF, VCA
  • Crossfade between layers 1 and 2
  • Global filter brilliance and resonance control for additional resonance
  • Polyphonic aftertouch destinations: LFO speed, LFO to VCO amount, LFO to VCF amount, filter brilliance, volume level
  • Keyboard tracking adjustment for VCF and VCA

Controls

  • MIDI/MPE with polyphonic aftertouch
  • Polyphonic pitchbend
  • Unison
  • MIDI over USB
  • 128 factory and 128 user presets
  • Alternate scales and tunings
  • Software editor by Spektro Audio

Display

  • 128×64 OLED display

Connectors

  • DC input jack (9-24V)
  • External modulation input jack (1/4″)
  • Expander jack (DIN5)
  • USB jack (type B, device/host)
  • MIDI IN jack (DIN5)
  • MIDI THRU jack (DIN5)
  • AUDIO OUT LOW jack (1/4″)
  • AUDIO OUT HIGH jack (1/4″)

Physical specifications  *   the DIY VERSION is different for the depth and weight

  • 19″ 4U rack-mount
  • Width: 483mm / 19″
  • Height: 178mm / 7″
  • Depth: 200mm / 7.8″
  • Weight: ~ 4.8 kg / 10.6 lbs incl external PSU brick.



Current identified Errors/Omissions/Errata:

DateLocationIdentified issue

Resolution












Bugtracker

further bugs, issues, problems are reported here (here are user reported issues due to soldering failures or other issues reported too)

https://github.com/ffont/ddrm-issues/issues


Deckard's Dream Home and Storehttp://www.deckardsdream.com


Current BOM

DD-BOM-REV2.1.zip


Shared Mouser Basket: not provided yet

Ultravox reply: "The cart doesn't include items that the BOM says are sourced from eBay, Small Bear, synthcube, etc."

About partsourcing:  check the price for the next price break ( 3 resistors are more expensive than 10)

for EU users: order from www.TME.eu standard parts, its cheaper as mouser


BOM Changelog

REVxxx     update here

(please note the version and changes at the bottom of the sheets. Also see Errors/Omission and Errata above)


Official Build Guide:

http://www.deckardsdream.com/build 



Firmware:

firmware is same as in REV.1:

DD-BOM-REV2.1.zip (April 2019)

don't copy apple macOS relevant files on the DDRM

Build: Deckards Dream General Build Thread

Discussion: DIY CS-80 imminent...(Deckard's Dream)

https://www.facebook.com/groups/deckardsdream/

Parts Resources:

Synthcube complete parts kits: http://synthcube.com/cart/ddrm-deckard-s-dream-kit

Thonk Group Buys for CEM3340: https://www.thonk.co.uk/shop/curtis-cem3340-ic-vco-chip/

Metal Case: DIY Hub http://siddarthianinnovations.bigcartel.com/product/deckards-dream-pre-order-front-panel-and-rack-case

Wooden Case: Ross Lammond (UK) http://www.lamonddesign.co.uk/index/


a very helpful Tool for the SMD Soldering: (and sponsoring for this website hosting)

(link here )



Wooden Case: Ross Lammond (UK) http://www.lamonddesign.co.uk/index/




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