Ensoniq SD-1

Ensoniq SD-1 Image

The SD-1 comes from a long line of Ensoniq's evolving TransewaveTM wavetable digital synthesizers. It began with Ensoniq's earliest synthesizer, the ESQ-1. That led to the SQ-80, then the VFX and VFX-SD (the latter featuring an on-board sequencer) and then to the SD-1 (and it eventually led to the Fizmo). The SD-1 allows for additive synthesis using waveform modulation, a sort of wavetable synthesis. This puts it into a unique class of digital synthesizers along with the PPG Wave series and Waldorf Microwave series.

The SD-1 can create all sorts of acoustic, electric, digital, and analog-like sounds. Its piano sound has over 1 MB of 16-bit waveforms to give it a full and rich realistic tone not found in other digital synthesizers of the time. That piano sound was just the beginning of what would become the "Perfect Piano" used in Ensoniq's ZR-76 and E-mu/Ensoniq's Halo series "Sounds of the ZR" ROM expansion soundset.

The SD-1 has 21 voices of polyphony just like its predecessor, the VFX (a 32 voice version later became available). A single patch can contain up to 6 of the 168 waves in its ROM memory that can be combined and layered. Advanced and analog-like synth parameters including its dual multi-mode digital filters, three 11-stage envelopes, LFO, and 15 modulation sources allow you to further shape and morph your sounds. There's even a built-in 24-bit VLSI dual effects processor with reverb, chorus, flanging and delay. The SD-1 also has a standard 61-note keyboard with velocity sensitivity, polyphonic aftertouch and full MIDI implementation with 12 channels for multitimbral functions as well as four 16-bit DAC outputs.

Like the VFX-SD, the SD-1 has a professional quality on-board sequencer making it a complete all-in-one music production workstation. This is a 24-track sequencer with 25,000 note capacity and it holds up to 60 sequences and 20 songs. There is quantization (96 ppqn), real-time or step entry, looped or linear mode, and auto-punch in/out. Tracks can be set to control the SD-1's internal voices or external MIDI equipment, or both at the same time! An on-board 3.5" disk drive allows you to store your programs, sequences, songs, and even MIDI SysEx data. The SD-1 is compatible with all VFX and VFX-SD program librarys too. An optional SQX-70 Sequencer Expander upgrades the sequencer memory from 25,000 to over 75,000 notes.

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32 Visitor comments
December 18, 2010 @ 8:01 pm
I just got a calibration error on my SD-1 and now it drops the high Bb key on all sounds. Any suggestions? Anyone?
June 4, 2010 @ 9:44 am
This is one of the synthesizers more used by Mike Oldfield in live shows and recordings through the 90´s
Tommy K.
April 19, 2010 @ 10:11 pm
John I still play the SD-1 every weekend in my band. I have had it since 1994 when I bought it new. The keyboard is bullet proof. The only problem I have had with it was something fell inside the keys in my case and shorted something out. Anyway I had that fixed and while the tech had it opened up he updated the battery for me. And that was about 6 years ago. Anyway if you havent had it checked out have the battery looked at. Rock on!!!
November 18, 2009 @ 8:35 am
Nelson, go to www.thesoniq.com
October 4, 2009 @ 12:47 pm
HELP! I have an Ensoniq SD-1 that I've borrowed for the time being and at band practice the other day in the middle of jamming, the SD-1 said "System Error 100 - Low" and shut off and will no longer power up. Please advice, I really need some help on this!
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  • Check Price
  • The link above will take you to an eBay search for this synth to see active listings. If you don't find it there, try looking in our forum marketplace or post a wanted classified.
  • Demos & Media
  • YouTube Thumbnail
    by Steve Sisson

    Manual - Download the original owner's manual from SoundProgramming.net.

  • Specifications
  • Polyphony - 21 voices (or 32 voices in the SD-1/32).
  • Oscillators - 1 to 6 per voice. Wavetable has 168 waveforms (multi-sampled acoustic instruments, sustained waveforms, harmonic and inharmonic structures) 3.5 MB ROM.
  • LFO - 1 LFO
  • Filter - dual multi-mode digital filters
  • Envelopes - 3 11-stage envelopes
  • Sequencer - 25,000 note capacity (expandable to 75,000), 60 patterns, 20 songs
  • Effects - 24-bit Dual VLSI Multi-Effects: reverb, chorus, flanging, and delay
  • Keyboard - 61 keys (velocity and polyphonic aftertouch)
  • Memory - 180 Patches, 60 Performances
  • Control - MIDI (12-parts)
  • Date Produced - 1990
  • Resources & Credits
  • Images from unknown source.

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