The expressive Fourm compact analog synthesizer with polyphonic aftertouch is now available for purchase directly from the Sequential webstore. We’re offering free shipping.

From the creation of the Prophet-5, the world’s first fully programmable polyphonic synthesizer, to the development of MIDI technology and beyond, Sequential has consistently pushed the boundaries of …

With its legendary Sequential tone, hands-on modulation, and uniquely responsive Tactive™ keybed, Fourm is a creative partner helping to bring your musical ideas to life.

As the modern successor to the legendary Pro-One, the Sequential Pro 3 monosynth represents the company’s most powerful and full-featured synthesis architecture to date.

With 150 GB of internal samples from acclaimed sound developers 8Dio, and all of the powerful synthesis tools you’ve come to expect from Sequential, the Prophet X has a musical voice uniquely …

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Sequential was founded by legendary instrument designer and Grammy-winner Dave Smith. In 1977, Dave designed the Sequential Circuits Prophet-5, the world’s first fully-programmable polyphonic …

Sequential’s web-based utility, Wavetable Generator, allows you to convert up to 16 single-cycle waves into a Pro 3-compatible wavetable and load it into any of the 32 user wavetable slots on the synth.

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Dave Smith, the creator of the Prophet-5 and founder of Sequential, is no longer with us. But he shared the story of the creation of this era-defining product in this video.