Sequential Circuits Pro-One Synthesizer

The Sequential Circuits Pro-One is a monophonic analog synthesizer released in 1981. It played a significant role in the development of 1980s electronic music, particularly in genres like synth-pop, new wave, and especially in the early days of techno music. Whether creating striking basses or high-pitched sounds, it quickly became a reference instrument for many musicians, including among others Vince Clarke, Depeche mode, The Prodigy and techno's founding father Juan Atkins.

"The Pro One is my heart. I'll use that Pro-One until it falls apart, and then I'll probably still use it if it makes any sounds." (Juan Atkins, "Future Shock" in Music Technology, December 1988)

Although its production lasted only three years, the Sequential Circuits Pro-One left a lasting mark on its decade and beyond with its sonic footprint. Today, it holds a cult synthesizer status and continues to be used in numerous contemporary productions. Like many vintage instruments, other brands have also produced hardware and software imitations of this famous instrument.

The Pro-One is highly valued for its rich and fat sounds, as well as its versatile modulation capabilities, making it a favorite among synthesizer enthusiasts and professional musicians. The Pro-One features a 37-key non-velocity sensitive keyboard, two CEM3340 voltage-controlled oscillators (VCOs), and a versatile modulation matrix (to the left of the control panel) allowing for complex sound design.

One of the Pro-One's standout features is its CEM3320 24dB low-pass filter, contributing to its distinctive and powerful sound. It also includes an arpeggiator and a 2-pattern, 40-note sequencer, allowing beginner and experienced musicians alike to create complex patterns and sequences with ease. External CV/gate connectivity is also provided. The Pro-One's robust build quality and intuitive interface have made it a prized instrument for live performances and studio recordings.