SEQUENTIAL FOURM: 4 voces analógicas para recrear un clásico

video upload by Hispasonic

Click CC for subtitles at the bottom of the player once the video starts.

Video descpription in Googlish:

Instead of a traditional review of the Sequential Fourm, we decided to take a different approach: putting it to work on a specific track. And not just any track: "Fade to Grey" by Visage—an absolute classic of 1980s British synth-pop. Every melodic and accompanying track you’re about to hear was created exclusively using the Fourm, starting from factory sounds (drawn from the approximately 300 initial presets) with only minimal tweaks. The only element not provided by the synth is the drums: an AI-generated Roland CR-78-style pattern, occasionally reinforced with a kick and snare from Logic’s sound library.

Along the way, Pablo demonstrates how to truly harness the power of a modern polyphonic analog synthesizer: polyphonic aftertouch (key for the lead vocal line, where some notes come alive while others fade out completely), intense mixer feedback (ranging from subtle thickening to nonlinear behavior with "ghost" harmonics), audio-rate filter modulation from Oscillator 2 (adding anything from brightness and vocal-like character to total sonic breakdown, depending on the intensity), glide for creating transition sweeps, and the LFO in random mode feeding the filter to ensure every note sounds unique.

We also cover specific recording techniques: layering basslines via MIDI using two different sounds and panning them; doubling hand-played pads so that the two takes aren't identical; and recording a MIDI pattern to free up both hands, allowing you to perform real-time timbral tweaks—adjusting the filter, resonance, and modulation intensity—during the actual audio recording.

📝 A quick refresher on the Fourm: a compact 4-voice analog synthesizer featuring two VCOs per voice, a 4-pole low-pass filter derived from the Prophet-5, one global LFO, two ADSR envelopes, a mixer with feedback capabilities, no internal effects, a mono output, a 37-key "slim" Tactive keyboard with polyphonic aftertouch, and a modulation matrix—inherited from the Pro-1—that is directly accessible right on the front panel. 00:00 Original vs. Fourm Version
00:24 Intro
01:35 Fourm Features
03:34 Polyphonic Aftertouch
04:57 "Fade to Grey" Intro
07:07 Bass
08:34 Chords
10:17 Sweep
12:32 Melody
18:50 "Clavi" Sound
19:34 Drums
20:39 Full "Fade to Grey" Version

PlantsSystem-LiveZen

video upload by plantssystem

‪@plantssystem-ufo‬
'LiveZen' — a meditative performance shaped around the Duos.
Built with the Poly‑Sequencer, Prophet‑5, CS‑10, and the spatial processing of the VS‑1880 (RSS), this piece blends improvisational noise textures from Duos with the delicate tones of the Prophet‑5 and CS‑10.
A quiet, breathing soundscape that drifts between motion and stillness.

#plantssystem #livezen #duos #polysequencer #prophet5 #cs10 #rss #vs1880 #noise"

Sequential Circuits Prophet VS 61-Key 8-Voice Polyphonic Synthesizer SN 0237

Note: links to listings are affiliate links for which the site may be compensated.

via this Reverb listing

Additional SYNTH CITY Listings

"The Sequential Circuits Prophet VS (Vector Synthesizer) is a classic 1986 hybrid synth, famed for its innovative joystick that blends four digital oscillators to create rich, evolving pads and otherworldly soundscapes. Designed by the late Dave Smith (RIP), this instrument is a landmark in synth history.

This unit is in great shape for its age, with only minor cosmetic wear consistent with normal use. Fully functional and ready to play.

Serial No.: 2400-0237"

CLICK FOR MORE »

Sequential Prophet VS – The Synthesizer Behind These Legendary 80s Sounds

video upload by RetroSound

"Discover the iconic sounds of the Sequential Prophet VS – one of the most unique and influential vintage synthesizers ever made! 🎹
This 80s synth can morph between four sounds in real time… and somehow still sounds more futuristic than modern plugins. You’ve probably heard it before—this is the Sequential Prophet VS.

In this video, I break down the most famous Prophet VS sounds, including the legendary evolving vector pads, digital choir textures, and metallic bell tones that defined late ’80s synth music.

The Prophet VS combines digital waveforms with analog filters and groundbreaking vector synthesis, creating rich, evolving sounds t
hat are still widely used in ambient, synthwave, film scoring, and modern music production.

Sound List:
0:07 Fancy - Flames Of Love
0:40 France Gall - Ella, Elle Là
0:57 Icehouse - No Promises
1:13 Whitesnake - Here I Go Again
1:28 Phil Collins - In The Air Tonight (Live Version)
1:45 Phil Collins - That`s Just The Way It Is
1:59 Phil Collins - Don`t Lose My Number"

Sequential Prophet VS Rackmount 8-Voice Polyphonic Synthesizer SN 0629

Note: links to listings are affiliate links for which the site may be compensated.

via this Reverb listing

Additional SYNTH CITY Listings

"The Prophet VS uses Vector Synthesis as its revolutionary new means of sound creation. It uses a total of four oscillators per voice with 127 waveforms (32 user) and dynamic waveform crossfading via the joystick. This was Sequential's first digital synth, and it was also their final synth unfortunately."

CLICK FOR MORE »

The Crow Hill Company Introduces the THE SH*T SYNTH

The Sh*t Synth - Walkthrough video upload by CROW HILL XTRAS

Press release follows:


The Crow Hill Company turns to extensive and rare collection to turn out THE SH*T SYNTH as compendium of 48 circuit-, wave- and sample-bent instruments

EDINBURGH, UK: The Crow Hill Company is proud to turn to its own extensive and rare collection of hardware to turn out THE SH*T SYNTH — available as a compendium of 48 circuit-, wave- and sample-bent instruments inspired by some of the Edinburgh-based enterprise’s eclectic musical favourites (spanning the likes of Aphex Twin, Boards Of Canada, Joe Maus, Jon Brion, Laurie Spiegel, Radiohead, Throbbing Gristle, and Yazoo) to create something that they collectively ask: is it just shit or ‘the shit’? — as of April 7…

Whatever way anyone chooses to read into the titling of THE SH*T SYNTH as the latest entry into The Crow Hill’s ongoing ORIGINS series of sample-based virtual instrument plug-ins, one thing is for sure: it readily represents a broad selection of three categories of 16 workhorse instruments each, effectively wrapped up into a single plug-in designed to bring a cohesive approach to making music more edgy, lo-fi, retro, and — swimming against the technological tide of so-called progress — decidedly AI (Artificial Intelligence) slop-free. From pianos to strings, plucks, beeps, bass, and pads, the compendium that is THE SH*T SYNTH has been lovingly sculpted by the Edinburgh-based enterprise’s media composer and ‘samplist-in-residence’ Christian Henson to take the hassle out of making existing sounds less refined, catering to those looking for an entirely new bank of Mellotron-style sounds as well as synths that have been long forgotten — for good reason, too!

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Sequential Circuits Prophet VS Keyboard to repair SN 1259

Note: links to listings are affiliate links for which the site may be compensated.

via this Vemia listing

Click the auction link on top when you get there for additional listings.

Pic of the inside below.

"In very good cosmetic condition, complete but needing repair. More info: The prophet power on all the supply voltages are ok, and the Display turns on (need new backlight) but with all segments lit. The keybed need a new aftertouch sensor."

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Siel Keytek CTS 2000 ultra rare Crosstable Synth + Original Case + Cartridge

Note: links to listings are affiliate links for which the site may be compensated.

via this Reverb listing

Demo video in the listing previously posted here (don't miss it).

"Ultra Rare SIEL Keytek CTS 2000 Crosstable synthesizer! (Serial N.049!)

I made a DEMO VIDEO to show how sounds this beauty (check it below on the gallery)

100% perfect working conditions

SERVICED by pro tecnician

comes with

- its original case

- cartridge


Technical Info:

The Keytek CTS 2000 is a digital synthesizer with analog resonant filters. It has 2 oscillators per voice with 8 voices and analogue CEM 3389 filters. The same as in the Waldorf Microwave I or Prophet VS. A mix of Ensoniq and PPG Wave.

Additionally it features Cross Table Synthesis which is described as wavetable synthesis with 333 digitally sampled waveforms. You can control up to 6 wavetables per voice with complete analog processing for each voice including 24db per octave filter. 2 envelope generators with up to 5 parameters and 3 LO's. 6 data entry slider for real time editing of all parameters."

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Sequential FOURM vs Prophet 5

video upload by Starsky Carr

"Is the Sequential FOURM effectively a "Prophet 4"? In this deep-dive comparison, I put Sequential’s compact powerhouse up against the legendary Prophet 5 to see how closely it recreates that iconic vintage DNA.

While the FORUM shares a strikingly intuitive Prophet-style interface—complete with dual oscillators, a resonant low-pass filter, and a dedicated polymod section—it also brings modern innovations to the table that the original Prophet simply can’t match.

We’ll explore the sonic character of the FORUM’s SSI chips, which act as modern recreations of the warm, fuzzy SSM chips found in the original Prophet 5 Rev 1 and Rev 2. By recreating classic factory patches side-by-side, we reveal the subtle differences in envelope behavior and modulation flexibility between these two analog beasts.

🎹 What’s Covered:
• The "Prophet 4" Factor: Comparing the interface, layout, and "familiar" feel of both synths.
• SSI vs. SSM vs. Curtis: Breaking down the filter and oscillator chips that define their warmth and grit.
• Modern Upgrades: Exploring the FORUM’s Poly Aftertouch, built-in arpeggiator, and digital clock sync.
• The Feedback Circuit: A demo of the FORUM's unique feedback loop that adds "MiniMoog-style" grit and prevents bass loss at high resonance—something the Prophet 5 famously struggles with.
• Patch Recreation: A side-by-side listening test of 8 classic patches to hear the real-world sonic differences.

🔗 Stay Connected:
• Exclusive Patches & Samples: Join the community on Patreon for the custom banks used in this video!
• Shop Sound Banks: Visit StarkeyCar.com for professional patches, tutorials, and freebies.
• Socials: Check out my Instagram for more gear shots and studio updates."

⏱️ Timestamps:
• 00:00 – Intro: Single Voice vs. Polyphonic Power
• 00:46 – Interface & Layout Comparison
• 01:23 – The Tech Specs: SSI Chips & Analog VCAs
• 03:08 – Side-by-Side Patch Recreations
• 04:05 – Analyzing Envelope & Drop-off Differences
• 04:40 – PolyMod of the pulse width
• 07:54 – Modulation & Polymod Limitations
• 11:37 – Beyond the Prophet: Feedback & Resonance
• 13:50 – Poly Aftertouch Demo
• 14:20 – Build Quality & Final Verdict

Prophet-5 vs Prophet-10: The sound test & my REAL thoughts

video upload by Doctor Mix

"🔥🎹👉 Explore the Sequential Prophet-10: https://sequential.com/product/prophe... 👈🎶🔥

A lot of people think it's just about voice count, but there's more to it. I'll take you deep into their unique character, how their polyphony impacts your composition, and critically, which one truly fits your specific production workflow and musical vision. In this video, I'm putting these iconic synths head-to-head 🎛️. I'll compare their oscillators (sawtooth and square wave) and filters (Rev 1 and Rev 3) to uncover all the sonic nuances. I'll also explore modern features like aftertouch and velocity modulation found on the Prophet-10 🎹, showing you exactly how they impact expressive performance. You'll hear direct comparisons, and I'll show you how these analog machines handle tuning and drift, giving you my comprehensive take on what makes each Prophet unique.

🎬 What you’ll see and hear in this video:

• 🔊 My in-depth comparison of Prophet-5 vs. Prophet-10 oscillators
• 🎛️ Dissecting the sonic characteristics of Rev 1 and Rev 3 filters
• 🎵 The impact of aftertouch and velocity modulation on synthesis
• 🧐 Exploring analog drift and the 'tune' function
• 🎹 How polyphony (5 vs. 10 voices) shapes my playing
• ✨ Uncovering subtle sonic differences in sawtooth and square waves
• 💡 My practical insights for choosing the right Prophet for your studio

🔥 Visit my Doctor Mix website for sound packs, courses, merch & more
👉 https://doctormix.com


🎧 Professional Services
Get your music professionally mixed, mastered, or produced
👉 https://doctormix.com/services"

Waves of Evermore | A 3rd Wave 8M soundscape

video upload by MIDERA

"I picked up a 3rd wave 8M in a trade (my Jupiter 6 and Poly Evolver for their Xpander, 3rd Wave, Chase bliss Thermae, and cash) and honestly didn't think I'd like the 3rd wave very much, after having played the 24 voice desktop. Surprisingly, I am liking it more than I thought I would. Can't say I like the voice count at 8, especially if you can get the 24 voice for $2500 used... but it's not too bad. I just notice the voices dropping off on the 8M in a way I don't with other 8 voice synths like the Prophet VS. I wonder why that is, apart from maybe the 8M having a much longer release stage to the envelopes, but otherwise I have no idea.

Well, I do like it, sounds really nice actually."

Sequential Circuits Prophet VS Keyboard SN 2400-1063

Note: links to listings are affiliate links for which the site may be compensated.

via this Vemia listing

Click the auction link on top when you get there for additional listings.

"I bought this at VEMIA last year because it was at a fantastic price and thought I'd risk having to do a bit of work on it at that price. In fact it was far better than I expected, perfect working order inc the aftertouch which is often not good, new OLED display, I think originally imported from Wine Country (always a good sign, never seen a bad synth from them), sounds great, looks ace, much nicer to use than the rack, plus the original manual. But I've got to be sensible. As someone else once said, too many synths. Start price is what I paid.
Back at VEMIA for photos and packing. 18GBP."

CLICK FOR MORE »

Prophet-10 in the Studio: 10 Voices, Aftertouch, and Why It's Better Than You Think

video upload by Doctor Mix

"🔥🎹👉 Explore the Sequential Prophet-10: https://sequential.com/product/prophe...
👈🎶🔥

✨ The Sequential Prophet-10 is a modern revival of one of the most legendary analog synths ever made — now with 10 voices, vintage Rev1 & Rev3 filters, poly mod, unison, and expressive aftertouch.

In this video we bring the Prophet-10 straight into the studio and explore what it really sounds like — no manuals, no overthinking, just switching it on and playing.

We start with the raw analog sound, completely dry with no effects, then explore unison power, poly mod textures, expressive aftertouch, and the character of the Rev1 and Rev3 filters.

Along the way we create sounds live and see why the Prophet-10 remains one of the most inspiring analog synths ever made.

What you'll see and hear in this video:

• First hands-on exploration of the Sequential Prophet-10
• 10-voice analog architecture explained
• Raw Prophet-10 sound with zero effects
• Expressive playing with aftertouch
• Poly Mod magic and evolving analog textures
• Rev1 vs Rev3 filter character comparison
• Huge unison sounds and thick analog bass
• Pads, leads, and classic Prophet tones
• Real studio workflow and performance testing
• Why the Prophet-10 is such an inspiring instrument

🔥 Visit my Doctor Mix website for sound packs, courses, merch & more
👉 https://doctormix.com"

GreyScale-LiveZen

video upload by plantssystem

"GreyScale presents 'LiveZen' — a meditative performance shaped around the Duos.
Built with the Poly‑Sequencer, Prophet‑5, CS‑10, and the spatial processing of the VS‑1880 (RSS), this piece blends improvisational noise textures from Duos with the delicate tones of the Prophet‑5 and CS‑10.
A quiet, breathing soundscape that drifts between motion and stillness.

#livezen #duos #polysequencer #prophet5 #cs10 #ambient #rss #vs1880 #greyscale #noise"

Winter palace | Peaceful soundscape improvisation

video upload by MIDERA

"Playing the Prophet VS with NI Raum for reverb

#prophetvs #sequential #nativeinstruments"

RetroSound Studio Tour: Vintage Digital Synthesizers

video upload by RetroSound

"RetroSound Studio Tour:
Legendary Vintage Digital & Hybrid Synthesizers of the 80s and early 90s

In this episode of RetroSound Studio, I explore classic digital synthesizers that revolutionized electronic music production during the 80s and early 90s. From FM synthesis and wavetable synthesis to vector synthesis, PD synthesis, vitual analog and Roland’s LA synthesis, these instruments introduced a new generation of sound design and defined the sonic identity of an era.

The Yamaha DX7 became one of the best-selling synthesizers of all time, defining FM electric pianos and metallic digital textures. The PPG Wave pioneered wavetable synthesis, laying the foundation for modern digital sound engines. The Sequential Prophet VS introduced vector synthesis, allowing dynamic blending between digital waveforms. The Roland D-50 shaped late-80s pop and film scoring with its LA synthesis architecture, while the Roland JD-800 brought hands-on control back to digital synthesis in the 1990s.

These digital synthesizers shaped genres such as synth-pop, new wave, ambient, house, techno, trance, and film music. Today, they remain highly sought after by producers, collectors, and sound designers researching vintage digital synthesizers, 80s keyboard sounds, virtual analog, classic FM synthesis, and wavetable history."

The Digital & Hybrid Synths:
0:07 Sequential Prophet VS
4:39 PPG wave 2.2
10:36 Yamaha DX7 II FD
14:56 Yamaha DX11
16:39 Casio CZ-101
19:29 Casio VZ-1
21:21 Roland JD-800
26:40 Roland D-50 / D-550
28:00 Korg Wavestation EX / SR
31:24 Korg DW-8000 / EX-8000
32:42 Roland M-VS1
35:57 Kawai K5000R
38:57 Waldorf Microwave
39:44 Waldorf Microwave II XT
41:15 Clavia Nord Modular
41:59 Yamaha AN1x
44:36 Roland JV-1080
45:33 Ensoniq SQ-80
46:23 Quasimidi Raven Max
47:42 Korg Z1

Full Studio Tour playlist:

Stanky Sequential Super Saw Sonic Showdown - Fourm vs Take 5 vs Prophet 10

video upload by Pork Chop Synthesizers

Oberheim TEO-5 Arpeggi-GREAT!

video upload by Pork Chop Synthesizers

Also see Sequential Showdown Prophet 10 vs Take-5 vs Fourm

Sequential Showdown Prophet 10 vs Take-5 vs Fourm

Pt. 1 - Just Jammin' - video upload by Pork Chop Synthesizers

Update:

Sequential Showdown Pt. 2 - Init Patch Exploration - Prophet 10 vs Take-5 vs Fourm

video upload by Pork Chop Synthesizers

Sequential Showdown Pt. 3 - Pads 'n' Organs - Prophet 10 vs Take-5 vs Fourm

video upload by Pork Chop Synthesizers

Comparing the Sequential Fourm to the Pro-One

"I Compared the Sequential Fourm to My Pro-One" video upload by Starsky Carr

0:00 intro jam and info
5:04 Really Deep Bass - THE FILTER
9:14 They've got Oscillators
11:24 Creating a Few Tones
15:11 PWM and how to match them
19:10 F to the M
20:00 Show Me The Sync
21:19 Pushing the Envelope 24:06 Overall..?

"Some genuine surprises in this head-to-head with the Sequential Fourm and the legendary Sequential Pro-One to find out if the Fourm can give the same vibe.

At first glance, the architecture looks familiar: dual oscillators, classic envelopes, a focused modulation section, and unmistakable Prophet-era DNA from Prophet-5 territory. But the big question is this: does the Fourm capture the raw punch, deep bass, and aggressive character that made the Pro-One a cult classic?

.. and I know it's not a clone :) but in this in-depth demo and comparison, I explore:

Oscillator behaviour, sync, PWM and FM
Filter differences (including low-end depth and resonance extremes)
Envelope response and modulation range
Bass performance, subs, and room-shaking tones
Where the Fourm goes beyond the Pro-One — and where it doesn’t

Rather than obsessing over perfect null tests, this video focuses on feel, playability, and whether the Four inspires the same kinds of sounds and musical ideas as the original Pro-One.

If you’re into analog monosynths, Sequential gear, vintage vs modern comparisons, or you’re wondering whether a contemporary synth can truly stand in for a rising-price classic, this one’s for you.

🎧 Headphones or proper speakers strongly recommended — some of these bass tones go very deep."