As it was located close by I drove there to pick it up myself. While talking to the seller she mentioned she had more stuff for sale. The Korg DW was the only thing I was interested in. I tested it and although it seemed to function as it should there was no sound on the outputs so I did not buy it. The DW has a built-in arpeggiator and digital delay unit up to ms delay, phasing, flanging, chorus and other time effects. All parameters can be altered in real time via a single programmable slider.
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Physical characteristics[ edit ] Physically, the instrument used a note synthesizer action keyboard. The DW keys were velocity sensitive. As such, a light press triggered a quieter sound and a hard press triggered a louder sound. As well, its keys could sense channel-pressure aftertouch as well. Aftertouch is the placing of pressure on keys after the initial striking or pressing of the keys.
The keyboard sends aftertouch messages via MIDI if required. A four-way joystick was provided to control low-frequency oscillation LFO modulation as well as pitch bending. Pulling the joystick bender towards you also allowed control over voltage-controlled filter VCF as well.
Around the back panel are jacks for headphones, stereo line out to plug into a keyboard amplifier , PA system , mixing board , etc. Also available are two sockets for tape recorder interface to facilitate offline patch backup and storage of sounds and other data. Electrical power was supplied via a two-pin IEC C9-type connection cable rather than the rather more ubiquitous C13 type, which can potentially be a source of frustration if lost.
Patch storage and backup[ edit ] The instrument had 64 memories which could be backed up to cassette tape in similar fashion to that used for home computers of the time. The instrument did, however, possess the capability in MIDI to allow sys-ex transfer provided you have a computer with suitable software that can send the MIDI dump request message to it. A more reliable alternative to the cassette tape interface is a portable CD, sound player or computer with WAVE files saved on disc although, in this last case, using sys-ex files is faster and saves space.
An optional accessory was the MEX, a hardware device which could provide extra storage to the user. The system can be thought of as an early sample playback system where only extremely short, single cycle waveforms are stored on four Kilobit ROM chips, played back through the two digital oscillators and processed by relatively familiar subtractive synthesis facilities.
The waveforms themselves were the usual staple sine , sawtooth , and pulse waveforms, but more unusually featured waveforms such as emulations imitations of acoustic piano and saxophone. To aid the user in appropriate selection, each of the sixteen wave samples are printed on the right-hand end of the operating panel along with the parameter reference below.
Any two of the digitised waveforms could be used by the two digital oscillators provided. A noise source could be added separately to add further timbre or tone colour. Oscillator modes[ edit ] The synthesizer makes use of two polyphonic modes and two monophonic modes.
Each of the two monophonic modes arranged the oscillators into a single note stack of slightly detuned oscillators. Use of these two monophonic modes changes the character of any given patch quite considerably, generally imbuing it with what could best be described as a powerful or "fat" sound. Analog VCA and VCF stages[ edit ] Whilst the source sounds were digital, the subsequent major sound shaping stages consisted of an analog variable-gain amplifier VGA enveloper using six stages and similar arrangement also for the analogue filter.
The filter is unmistakably analog and can be pushed into self- oscillation using the filter-resonance parameter. Further modulation of the sound could be applied using the single LFO which could either modulate oscillators to produce vibrato effect, the filter, or even both at the same time should such be desired.
A significant creative limitation of the DW architecture was that the user could not control the LFO depth with respect to each oscillator, as they were both modulated in common. Digital delay effects[ edit ] The final key part of the architecture was the digital delay section, which provided an effect unit that could be applied to the sound.
As the rest of the synthesizer architecture up to this point in the sound chain was analogue, the signal had to be converted back to a digital signal so that it could have the effect applied. This fact is evident in the increased noise when using the delay effect. Despite this, it was a flexible digital delay that gave times ranging from 2 to milliseconds in length.
Delay effects are similar to reverb. Added to this was a modulation depth parameter so the user could create chorus and flanging effects as well as delay. The arpeggiator also includes options to span multiple octaves and an adjustable tempo control slider. Historical assessment[ edit ] While DW may not have represented a great leap in synthesis, the hybrid architecture of digital waveforms through analog filters was to become an important approach used in Korg keyboards during the second half of the s.
Other manufacturers were developing instruments using similar ingredients of samples and effects, though still using traditional subtractive synthesis with better technology. The Korg DW was monotimbral and had trouble competing with the Roland D and MT introduced two years later, which used samples of real attack transients to synthesize increasingly realistic acoustic instrument sounds.
The MT32 also introduced multitimbral capabilities, with relatively high quality onboard effects. Korg took longer to develop a competitive synthesizer, but by the end of the decade achieved considerable success with their M1 workstation keyboard which included 14 of the 16 DWGS waves from the DW .
Korg DW-8000 Service Manual
There is now a manual online! Thanks to Bryan Ressler and his excellent DW page. It features 8-note polyphony, built-in digital delay, 64 patch memory - state of the art in ! With a mini-wavetable of 16 waveforms, the VCO,VCF, VCA, and envelope generators are perfect for getting all those old analog sounds, as well as a few fairly realistic instrument sounds.
Samuzshura Disconnecting certain vires can scramble the memory contents and the DW will require re-initialization. Unplug all electrical connections first and do not touch anything connected to electricity. Let it rest on the table on its rubber feet so that the keyboard is facing towards you. Memory architecture, operation and interface pg, IV: If the plastic plunger is correctly installed it won f t come loose no matter how much the DW is shaken. I will give it a try for sure. KORG will be happy to give you the name of a service facility near you if you call them cw I removed it with a combination of cutters, soldering iron and solder sucker.
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