Sequential Circuits' Pro-One

Rebirth of the classic ... ProOne reincarnation
Plug-in for SCOPE Fusion Platform systems
and for the Noah synthesizer



This one-to-one reproduction of the analog cult synth is the first fruit of an ongoing cooperation between CreamWare and former Sequential Circuits' developers in particular, John Bowen, who played a crucial role in the creation of the original. All features of the original have been painstakingly recreated, including the audio input for processing of external signals, the step sequencer and the arpeggiator.
The model
The Pro One was produced between 1981 and 1984. About 10,000 units were sold. The Pro-One, like the Minimoog, is considered one of the most capable monophonic synths ever built. Its adherents include such well-known musicianss as Vince Clarke, Hardfloor, Depeche Mode and Mouse On Mars. What made the original so popular was its huge flexibility and abundant modulation options, the integrated step sequencer and arpeggiator, and above all else, naturally, its very unique, powerful sound. All of these same features are now likewise to be had in the plug-in version of the Sequential Circuits' Pro-One. An instrument for SCOPE Fusion Platform systems and for the Noah synthesizer.

From original to plug-in
Using CreamWare's Circuit Modelling process, all hardware elements having an influence on the sound were modelled individually in full detail. The characteristic Pro-One sound is absolutely true to the original and free of aliasing effects. The resonance and distortion characterstics of the original filter are fully available for use, and even filter FM (frequency modulation) is possible, thanks to the high quality of the algorithms employed. The analog nature of the original sound is thus fully retained. The passion for detail is further evident in the user interface. The control elements were specially adapted in order to reproduce the characteristics of the original ones. If you happen to still be in possession of Pro-One patch sheets, you can transfer the settings directly from these sheets to the plug-in and save them as presets.

The structure
The Pro-One employs a classic synth architecture: its sound sources include two oscillators, each of which can generate multiple waveforms simultaneously.The oscillator signals are mixed with white noise and/or an external signal in the mixer section, which is followed by the 24dB low-pass filter and the amplifier. Among the special attributes of the Pro-One are its flexibile modulation options, the auto-repeat function for gating of internal and external sounds, and an envelope follower which permits the gating of sounds via external signals as well.

The filter and extra features
The filter section consists of a modulatable 24dB/octave low-pass filter with resonance extending to self-oscillation. Thanks to CreamWare's Circuit Modelling process, the filter possesses all of the personality of the original and lends the typical Pro-One character to the sound. Although the main goal in developing the Pro-One was to remain as true as possible to the original, a few extensions were nevertheless included: the envelopes include adjustable velocity sensitivity, the envelope follower's threshold is variable, and the use of MIDI clocking is possible. In addition, the Pro-One was given an effects section including chorus/flanger and stereo delay.

Step sequencer and arpeggiator
The plug-in version of the Sequential Circuits' Pro-One, just like the original, has a step sequencer and an arpeggiator. The step sequencer is simple but effective. Two sequences of up to 32 steps each can be programmed via MIDI. The sequences are looped in playback and can be transposed via MIDI. Likewise, the arpeggiator was adapted one-to-one from that of the original Pro-One. In conjunction with the step sequencer, it's a very practical tool for live performance.

As a consequence of the highly complex algorithms used in the Sequential Circuits' Pro-One, its polyphony is limited.
As a rough guide: on a 3-DSP card you can expect to have 4 voices, on a 6-DSP card 8 voices, and on a 15-DSP card 16 voices.

Comes with more than 196 presets from professional sound designers

Sound example
Antelope (mp3, 711 KB)

Creamware Italy : Midi Music tel.(++39) 0113185602, e-mail
Creamware Germany
Creamware US
Creamware Benelux
Creamware France
Creamware Spain
Argentina: Sigma Delta
Australia: Major Music Wholesale
Austria: KS music
Czech Republic: B.L.A
Greece: KEM electronics
Hungary: Studiotech Hungary
Japan: Cameo Interactive
Lithuania: Prodigis
Russia: MixArt
Switzerland: Audiotech KST
Ukraine: Real Music
UK: SCV London

advanced technologic sound magazine
2003 september issue 117

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