video upload by Sequential
Update: the first user videos added below. Note: this post is pinned on top, see below for new posts going up throughout the day.]
"Fourm 4-voice analog synth with polyphonic aftertouch
Fourm is a compact analog synthesizer that invites you to play, shape, and perform with unprecedented expression. 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.
Synth sounds and drums exclusively by Fourm. Composed by Peter Dyer."
https://sequential.com
See the dealers on the right of the site for availabily.
User videos:
Playlist:
1. The new Sequential Fourm in 60 seconds! #analogsynth #synth - Available at Signal Sounds
2. Sequential FOURM -- J3PO demo & overview
3. Sequential Fourm Analog Synth INHALT Demo & Discussion
4. Sequential FOURM Review — Classic synth sounds in a small package! - BoBeats
5. Introducing the Sequential Fourm Synth | First Look & Demo - Gear4music Synths & Tech
6. Sequential Fourm: Poly aftertouch, stacked waves, expressive arps – First look and sound demo - MusicRadar Tech
7. Sequential Fourm Performances & Overview - Sweetwater Soundcheck
8. SEQUENTIAL FOURM: the synth we’ve ALL been waiting for? - Projet Home Studio
Press release and pics follow:
Sequential Introduces Fourm: A Four-Voice Analog Synth with Polyphonic Aftertouch
A New Fourm of Expression
San Francisco, CA — September 23, 2025 — Sequential has announced the release of its most affordable, synthesizer to date. Fourm is a compact, 100% analog instrument that redefines expressive electronic performance. With its warm, organic tone, hands-on modulation routing, and a uniquely responsive polyphonic aftertouch keyboard, Fourm is ready to bring your musical ideas to life.
At its core, Fourm delivers four analog voices of genuine Sequential sound, derived from the legendary Prophet-5 — complete with dual oscillators, a classic 4-pole lowpass filter, and envelope curves modeled after the 1978 original. The result is unmistakable Sequential warmth and punch, now with overdriven feedback for a performance-ready edge.
For the first time in 40 years, Sequential has returned to polyphonic aftertouch. The team developed the new Tactive™ slim-keys poly AT keybed to work in concert with Fourm’s analog synthesis engine. Every element was co-designed and precisely calibrated to unlock new levels of expression, enabling a deeper connection to our signature sound that no off-the-shelf keybed could deliver. The result is a more expressive bond between player and instrument, energizing new modes of creativity.
“Wowww holy smokes: this thing sounds and feels amazing,” said Bryn Bliska, (keyboards for Chappell Roan, Maggie Rogers, Jacob Collier). “The polyphonic aftertouch is seriously so fun… Sequential nailed it.”
“We’re so excited to bring this innovative all-analog keyboard into the world,” said David Gibbons, Sequential CEO. “At a price-point that most people expect to pay for a monophonic synth, we think this product will invite legions of musicians who have longed for the magic of polyphonic analog sounds to start their journey of discovery with Sequential.”
Notably inspired by the Pro~One, Fourm’s top-panel modulation matrix puts deep sound design at your fingertips—no menu diving required. Modulation sources and destinations are clearly labeled, connections are made with a button press, and color-coded indicators make even complex routings easy to manage.
With its compact footprint, professional-grade build, and a sound engine rooted in Sequential’s most iconic instruments, Fourm is a powerful new voice in analog synthesis.
About Sequential
Sequential has been at the forefront of synthesizer innovation since 1974, creating instruments that inspire musicians and shape the sound of modern music. With a legacy built on the iconic Prophet synthesizers, Sequential continues to push the boundaries of sound design with cutting-edge technology and exceptional craftsmanship.
