DDRM rev.2 guide

DDRM rev.2 guide

Page History:

Date

Autor

what



Date

Autor

what



May 9.  2018

LED-man

DDRM 2.0 guide initial



Oct 25. 2018

LED-man

BOM added



July 30 2019

LED-man

software



Feb 2020 

LED-man 

BOM pricing 



June 2020

LED-man

structure



Oktober 2021

LED-man

BOM 6N138 to 6N139



Table of Contents




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 componentsA addional 1U expander is planned - release in 2018Examples of Presets and voices: https://soundcloud.com/deckardsdream



Technical Specs:

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:

Date

Location

Identified issue

Resolution

Date

Location

Identified issue

Resolution

Oktober 2021



BOM failure

change the 6N138 to 6N139 or you run in stucking notes












Assembly Voicecard Guide: (credits to Trey Petty)

DDRM Voice Card Guide.pdf updated 04 July 2022

 the  10K resistor diagram, was incorrectly indicates the R185 position.

User Manual

Deckards_dream_manual_130.pdf

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 (last version valid 2.1.4 - Sep.2019)

DD-BOM-REV2.1.4.pdf  DD-BOM-REV2.1.4.xlsx.  change the 6N138 to 6N139 !!


Shared Mouser Basket: https://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=15f70d6513 (made by me - 09/2019 from 2.1.4 BOM, not checked by me - but the amount of parts looks ok)
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
Prices incl. 19% VAT(Germany) and shipping (combined)Mouser 630€
OLED 10€
bracket 15€
spacers 25€
screws 10€
psu ext. 20€
v2164 x35 120€
CEM3340 x16 250€ or AS3340 120€
poti 100K   1x 2€
slidercaps set 12€
pushbuttons x5  5€
noise PIC x1 10€t. TOTAL : 1.111€
plus DIY PCB SET 999USD netto (no VAT/TAX calculated)plus Case 270USD netto (no VAT/TAX calculated)

how to bugfix: https://diysynth.wiki.dsl-man.de/wiki/spaces/SKM/pages/336101402/How+to+bugfix

non commercial pages, all infos are best can do without warranty, without liability.