Sequential Circuits Pro One

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Sequential Pro One Image

The Sequential Pro One is a wicked little monosynth! It comes from the same period and genre as the Roland SH-101 and Moog Prodigy. The Pro One was basically Sequential's attempt at taking their legendary Prophet 5 poly-synth and packing it into a compact, inexpensive, monophonic analog synth! It has two VCOs, a great 4-pole lowpass filter, two ADSR envelopes (one for filter), and a compact three-octave keyboard. With a Pro-One, you can easily create punchy analog bass-lines and leads or quirky analog synth effects.

The Pro One is an extremely flexible synth with lots of modulation possibilities (ie: the filter, VCO B and LFO can modulate VCO A or B frequencies or pulse widths, or the VCF). There's also an onboard sequencer, something common on many Sequential synths but not often found on other monosynths of the time. It is very basic, however, storing only two patterns and up to 40 notes max. Also, only pitch info is recorded (and in step time only); you can not assign a note duration to any notes. So it's basically a short melodic sketch-pad...but useful. Also onboard is an arpeggiator which has UP and UP/DOWN patterns.

Sequential Pro One Image

The Pro One is relatively simple and intuitive to use, fun, educational and responsible for some of the coolest and hardest basslines in electronic music today! It is used by Hardfloor, Überzone, the Prodigy, Cirrus, Fluke, Depeche Mode, Download, Banco De Gaia, Vince Clarke, New Order, Freddy Fresh, Mouse on Mars, Prince, Soft Cell, Richard Barbieri and Sigue Sigue Sputnik.

But since you can't always find one (about 10,000 were produced), or one that works properly... Wine Country Sequential has come up with a solution! WCS has been servicing old Sequential gear for years, as well as selling repair parts, etc. They have developed the Pro One Software Synthesizer Plug-In, an awesome replica of the original Pro One, both in look and sound! It has some added features and is an incredible way to easily add the sound of the Pro One to your music!



36 VISITOR COMMENTS

Intellectualdiot
February 3, 2012 @ 1:57 am
It'll probably be gone before anyone here gets a chance to read this message, but I just saw one of these listed online at Music Go Round's website.
Alan Earlie
January 15, 2012 @ 4:41 am
Got one of these i'n brilliant condition.. if anyone is interested please email me for offers.. serious offers only, Will ship to anywhere i'n the uk but would prefer collection.

alanearlie@hotmail.com
Roh
December 29, 2011 @ 7:28 am
Amazing synth - killer. Got mine at a steal, I was very lucky!! Goes head to head with a Mini, IMHO.
beatbox
December 24, 2011 @ 5:17 pm
Liam Howlett playing around with some great pro one sounds: http://www.youtube.com/watch?list=UU4UCmTMSvXyaA-VaAabWIkQ&a mp;feature=player_detailpage&v=5bmt9jTbSGI#t=343s
klimperei
October 15, 2011 @ 5:08 pm
I had one, & was happy with it...
http://klimperei.free.fr
 
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  • Demos & Media
  • YouTube Image
    Video 1
    - See and hear it in this YouTube Demo!

    Audio Clip 1 - Filtered arpeggios and other sounds of the Pro One, from Future Music CD, issue 108.

    Audio Clip 2 - This Demo plays four sets of comparison tones. The first tone in each set is an original Pro One and the second tone in each set is the WCS Pro One "survival kit" softsynth.

    Night Crawler - This is a text file outlining some settings for a Sequential Pro-One. Courtesy of Music Machines.

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

  • Specifications
  • Polyphony - Monophonic
  • Oscillators - 2 VCOs (CEM-3340 chips): : VCO A saw/pulse, VCO B saw/tri/pulse, Noise
  • LFO - saw, tri, pulse
  • Filter - CEM-3320 Filter chips: 4-pole lowpass with Cutoff, Resonance, ADSR Envelope, Keyboard Tracking
  • VCA - ADSR Env
  • Keyboard - 36 keys
  • Arpeg/Seq - Arepg: UP, UP/DOWN patterns, Latch mode; SEQUENCER: 2 patterns of pitch info only, 40 note capacity.
  • Control - CV/GATE
  • Date Produced - 1981 - 1984
  • Est. Value - $500 - $1,500

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