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Alesis D4

 

 

 

alesis d4
audio demo Country: USA
Weight: 2 kg
Dimensions: 43,6 (H) x 483 (W) x 200 (D) mm
audio demo trend price : 70€
manual demo sample video comments

Alesis D4
Drum Module (1991)

 

Digital rackmount module based on PCM samples features 12 analog trigger inputs controlled by DYNAMIC ARTICULATION technology.

D4 display

 DYNAMIC ARTICULATION


info RACKMOUNT
single rack unit.
Main panel features a 16 X 2 lines display, 12 push buttons, a data encoder and a preview trigger (non-dynamic) pad.

Back panel terminals connectors:
- main signal output
- AUX output
- 12 jack triggers inputs
- footswitch input for hit-hat control or assignable to other functions
- headphones (front)


acPower supply is external AC-AC type 9V / 830 mA original is P-3.






edit TECH main core is a 8-bits 8031 / 80C31 MPU which manages 16 voices polyphony - converter DAC is a common 16 bits Burr-Brown PCM54. The D4 sound generation is based on plain PCM samples on the ROM wavetable assigned to a Midi note or a special trigger.

samples The basic sound architecture is the KIT (a kind of patch) composed by up to 61 PCM samples shots.

 


edit WAVETABLE
internal mask ROMs contain 541 PCM waveforms at 16 bits resolution - most are mono-sampled but some are stereo natives.

samples
bassdrum (x99) demo
snare drum (x99) demo
cymbals-hihats (x55) demo
tom toms(x92) demo
FX effects(x80) demo
percussion/chromatics (x76) demo





edit INTERFACE EDIT
classic nineties programming with submenus.



edit EDIT
basic sound parameters includes panning, pitch tuning and analog out assignment following 4 configurations:

trigger drum input

- A: 2 stereo pairs
- B: 1 stereo
- C: 2 mono
- D: 4 mono.

 


trigger TRIGGERS each sound is assigned to one of 12 trigger inputs based on custom DYNAMIC ARTICULATION system technology, compatible with most trigger systems.
Some dedicated trigger parameters matches the drummer playmode behavior:

triggers sumup
- sensibility adjustment
- 8 velocity curves
- decay time
- crosstalks: a threshold gate filters nearby pads vibrations (PIC)




midi MIDI
the drum brain works also with standard Midi system but the implementation is rather poor offering just a few Midi CC# like volume, pitch bending and program change.
Check out full Midi Parameters LIST.


clock midi

 



memroy MEMORY
:
- 21 RAM user kits
Kits and configuration are saved to SRAM memory - data can be backup to Midi exclusives datas.

internal d4

Battery replacement: 3V BR-2325 lithium battery soldered to mainboard, replacement involves soldering

- click LEFT for bigger picture -



midi
OS lastest version is 1.4 burnt in a single 64 Kb EPROM 8 bits model TMS27C512.

internal d4

midi- DOWNLOAD LATEST FREE BINARY -




memroy MAINTENANCE
2 typical issues as machine ages:
- LCD missing some lines
- ALPS data wheel encoder getting unprecise - clean it - or change it.

internal d4



memroy RELATED MODELS:

alesis dm5

- DM-5 (1996) updated D4 at 18 bits resolution DAC and 500 sounds VIDEO

- DM-6
(2009) VIDEO

- DM-10 (2012) VIDEO



effet VST PLUGIN / SAMPLED VERSION there is no official D4 VST plugin, however some free samples collections:

free d4 samples


info

1 full set sampled free D4 samples
FREE DOWNLOAD

 

demoAUDIO DEMO

demo factory demo
demo drum pattern
demo electro drum machine TR-808
demo heavy kit
demo standard kit 1
demo standard kit 2



video VIDEO SELECTION

video1 DIY Electronic Drum Set video2
demo DIY Electronic Drum Set knocking on

 

Company: Alesis
Model: D4
Class: Drum Module
Dates: 1991
Synthesis: PCM rompler
Display: 16 X 2 lines
Analog outs: 4 jack
Polyphony: 16 voices
Resolution: 16 bits
N. waves : 541 PCM
Trigger inputs: 12
Memory: 21 kits
ROM: 6 X mask Tosh
Effects: none
Midi: IN / OUT / THRU
Latest OS: 1.4
CPU: Intel 8031
DAC: BB PCM54
PSU: 9VAC
Demo: 6

alesis d4

 


alesis d4 reset procedure

Factory Reset procedure

HOLD VOICE AND OUTPUT WHILE POWERING ON

 

D4 TEST MODE

Power up while holding the "MIDI"+
"DRUMSET" buttons simultaneously.

 

 

manual
MANUAL


manual
SERVICE MANUAL


manual
-more demo
- more free samples set

 


original scan
manual original Brochure

 

Alesis D4 for sale

alesis d4 for sale
CHECK OUT EBAY OFFERS

 

 

 

 

CPU INTEL REVISION BOARD CHIP
awardSPECIAL AWARDS:

cheap as hell!
Cheap as hell


comment


REVIEW "Good dynamics and clear converters at the time , If you're on budget it's ok but consider also DM5 which as better sounds kits."

manual manual
-many sounds - some outdated sounds
-cheap
limited edit

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all snapshots, sounds, texts copyright Polynominal.com / Eric Pochesci polynominal.com is not associated or affiliated with ALESIS in any manner.

 

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