Ensoniq EPS

Ensoniq EPS Image

EPS means 'Ensoniq Performance Sampler'. The EPS is just that with clever new features that make it not just a professional studio music production tool, but also a powerful live performance instrument. Its biggest feature is its ability to load new samples while playing the instrument, a feature you'd be lucky to find on current synth/samplers. The EPS is somewhat multitimbral in that you can have 8 instruments on-line one at a time or stacked* and switching between them is as easy as pushing one of the 8 instrument buttons. The 'Patch Select' buttons over the Mod-Wheel allow for on-the-fly patch switching from a spot where your hand is likely to be while performing!

Its unique 13-bit sampler is highly versatile with multiple sample rates to choose from (6.25 to 52kHz). However, higher sample rates mean less polyphony and sample time. Unfortunately sample memory is miniscule at 480 Kb yielding anywhere from 5 to 41 seconds of sample time. Fortunately it is expandable up to 896 Kb (with optional 2x expander) or 2.1 Mb (with optional 4x or 4x+SCSI expanders) allowing as much 167 seconds of sample time. Some of the EPS's goodies include an 8 to 16 track sequencer (which steals its memory space from the same RAM that holds the samples) with quantizing, digital filters that seem like analog and preset template envelope options.

Ensoniq EPS Image

The EPS brought together many facets of synthesis at its time: sampling, synthesis and performance. It blended these together in a superb machine that, despite its limited sample memory, is quite popular and useful even today. Though it was later upgraded to the full 16-bit EPS-16+, the 13-bit EPS is a very cost-efficient alternative for any musician in search of classic keyboard-samplers!

* Although you usually play one instrument part at a time, you can get all 8 up at a time. With the EPS in Load mode by first selecting an instrument and then double clicking another instrument both will be played together. Continue double-clicking the other instrument buttons to layer all 8 instruments! (submitted by Rod Wesson and John Rule).

The EPS has been used by Cirrus, Wu-tang producer RZA and filmaker/composer John Carpenter.

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66 Visitor comments
matt
August 23, 2011 @ 6:28 pm
This appears to be incorrect info from Wikipedia:
"The base memory is 256k not 480k and it's only expandable to 1mb not 2.1mb. Stock sample time is 4.93 secs @ 52KHZ, 41.57 secs @ 6.25Khz"

The specs listed here at VSE are correct.
j-el
July 5, 2011 @ 6:19 pm
Found a 2x expander for mine for 30 bucks! Fixed the display (kept going out) dirty contacts. Wanna put a "ecooler" on the back but I can't find one at Route 66...maybe I'll make one.
PS I've owned a SP12 b4 and the EPS is a SP killer!
J-EL
March 31, 2011 @ 12:56 pm
The base memory is 256k not 480k and it's only expandable to 1mb not 2.1mb. Stock sample time is 4.93 secs @ 52KHZ, 41.57 secs @ 6.25Khz
yusuff
March 24, 2011 @ 6:34 am
This site needs to check up on things properly. The EPS samples mono at 13-bit (A/D converter) and makes use of 16 bit processing and D/A converters (stereo). They really should re-issue this fantastic sampler keyboard with modern-day FX and memory. Would sell by the numbers.
Lamster
February 6, 2011 @ 5:34 pm
You can get images for Eps Eps16 and Asr10 online I made the mistake of using DSHD disks 1.44mb with my original drive. when I replaced it. The eps could not read them. after lots of messing about I found the solution was to stick tape over the hole in the disk that selects 720k or 1.44mb on a new drive. I haven't tried it but I guess if you stick tape over the hole of a 1.44 disc and write the image the machine should detect the disk as 720k and should work in the Eps. As for the computer needing to be old more likely to require an earlier operating system like win98.
 
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  • Specifications
  • Polyphony - 12 voices at 52 kHz.
    16 voices at 39 kHz.
    20 voices at 31.2 kHz.
  • Multitimbral - 8 parts.
  • Sampler - Mono 13-Bit A/D input, 16-bit D/A stereo output. Variable sample rates from 52kHz to 6.25kHz; Sample-time: 5 seconds (52kHz) to 41 seconds (6.25kHz).
  • Filter - Independent dynamic digital filter per wavesample, multi-mode digital low pass or variable-width band-pass with many slopes
  • VCA - 6-stage envelope including envelope preset templates
  • Sequencer - 8 tracks with separate instrument, volume, and MIDI channel. 80,000 notes limit.
  • Keyboard - 61 keys (velocity and aftertouch)
  • Memory - 512 Kb (480 Kb to be exact) internal (expandable to 896 Kb w/ 2x expander, 2.1 Mb w/ 4x expander)
  • Control - MIDI, Disk Drive (800K double-sided 3.5" micro-floppy), SCSI (w/ 4x+SCSI expander)
  • Weight - 29 pounds (13 kilograms)
  • Date Produced - 1988

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