The Sequential Fourm: He didn’t get it… until he played it.

video upload by Devin Belanger

"The Sequential Fourm looked limited on paper, but after a month in the studio, my perspective has completely shifted. In this Fourm review & demo, I’m moving past the specs to focus on 4 performance demo songs that showcase the unique tactile experience of this 4-voice analog synthesizer.

The combination of a 100% analog signal path and Polyphonic Aftertouch makes this one of the most expressive instruments Sequential has released in years. Whether you are scoring for film or sound designing from scratch, the Fourm demands a different approach to synthesis.

Get my Custom Synth Patches (Fourm coming soon): https://shop.milesawayofficial.com/co..."

PART 2 - Winter synth improv | Analog synth/spring reverb/chorus | meditation

video upload by Hazel Mills

"Listen for a gentle warming uplift, as the earliest glimpses of spring are emerging. Days are getting lighter, as they always do.

👋 Join my Patreon for FREE for similar videos, tutorials, studio vlogs and creative inspiration 👉👉👉 / hazelmills (...plus a description of how I built up this piece).

This is "Expanse Part 2", an improvisation that came to be because I'd been re-jigging my studio set-up and was testing a gear combo (listed below).

Sequential Circuits Prophet 6
Echo Fix Spring Reverb
Echo Fix Chorus Vibrato
Vongon Polyphrase
Vongon Ultrasheer

Happy Jamuary."

Today Marks the 10th Anniversary of the Sequential Oberheim OB-6

Andrew McGowan, pictured here with Tom Oberheim, wrote in to let us know today is the 10th Anniversary of the Sequential OB-6. Andrew was a product designer at DSI/Sequential and worked with Tom Oberheim on the OB-6.

You can find a write-up on some the development of the OB-6 as well as the Prophet-6 on his website, https://www.smartbombdesign.com.

A couple of excerpts:

"I was sitting in my office at Seer Systems one day in 1997 or thereabouts when the phone on my desk rang. It was Dave Smith calling from his home. 'I’ve been talking to Tom Oberheim. He’s between jobs and wants to learn about software synths, so I asked him if he wanted to write the Reality operation manual. Can you get him set up and manage that?' I knew who Tom was, of course, but I had never met him, and now Dave was asking me to be his manager. I had no reason to believe that Tom was anything other than the warm, bright, and kind person that I now know he is, but the idea that I would be managing him made me deeply uncomfortable.

Seer Systems was in the process of developing Reality, which is generally considered to be the first 'professional' software synthesizer, though I’m not certain what makes one synthesizer professional and another not."

[Side note: Propellerheads Rebirth was also released in 1997, however the demo version was released in October 1996. A bit like The Damned vs. Sex Pistols for those in the know!]

And [thought this was funny]:

"Those Fucking Lines

Tom and I had talked about synths over the years and, on several occasions, he remarked how often people asked him to remake the OB-X, perhaps because not many were made. Or maybe Rush/Tom Sawyer? I don’t know. What little I did know about the OB-X was that it had a (low-pass only) SEM filter, and we had already made a synth with an SEM filter in it. And our hardware engineer Tony Karavidas had worked at Oberheim and owned multiple Oberheim synths. I also felt very strongly that if we were going to make two poly synths that were essentially the same except for the filter, the 2-pole, SEM state-variable filter would be complementary to the Prophet-6’s 4-pole, OTA low-pass filter.

Tom’s wish list was short. He didn’t want the Prophet-6’s analog distortion. And he wanted the OB-Xa’s blue lines."

Read the rest here

[P.S. I still own an OB-6 desktop and it's one of my most cherished synths. There is something organic about it. The demos I've heard of Sequential's new FOURM have that about them. I have enough synths as it is but the FOURM is very, very tempting for this particular reason.]

Sequential Circuits Prophet VS Rackmount SN 0276

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

via this eBay listing

Pics of the inside below.

CLICK FOR MORE »

DSI PROPHET 12 w/ NEW SKB Hard Case

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

via this eBay listing

"This is the Prophet 12 Keyboard by Dave Smith Instruments, later by Sequential. It includes a brand new SKB hard shell case with unopened keys, model SKB31-4214-KBD."

CLICK FOR MORE »

Jamuary 2026 - 18 - Nocturnal Canine Emissions - Sequential Fourm Bedtime Vibes

video upload by Pork Chop Synthesizers

"I'm a few days late sharing this fun little sonic adventure created from the comforts of bed, surrounded by a couple of sleeping, farting dogs.

This was played on my Sequential Fourm"

Distant clouds

video upload by MIDERA

"Sequential OB-6, Rhodes piano, and Fractal Audio FM3"

Sequential Prophet-10 Dark Analog Sweep Synthesizer Rik Marston

video upload by Rik Marston Official

Synthesizer Demo by Rik Marston
*Watch in HD!* *NO Talking!* *Turn it up!*
My Etsy store: AhnyxianSoundDesign
https://www.etsy.com/shop/AhnyxianSou...

creation – organic analog synth journey

video upload by SOUNDS OF SYNTH

"creation is an organic analog synth journey. This piece is designed for deep listening (either on headphones or a good sound system). Play and listen without interruption allowing yourself to be enveloped in sound.
This track is created as part of the Forest Signals playlist which explores organic, analog music inspired by nature.

⭐ Gear Used
Sequential Pro 3
Moog Matriarch
Novation Peak"

1/17/26 Buchla + Eardrill + JRB + Synthetic Sound Labs + Peavey DDL-3 + CXM 1978

video upload by Cfpp0

"1/17/26 Buchla 258 & 244 & 281 292 + Eardrill Morphun + Synthetic Sound Labs 3650 + JRB VCBF + Peavey DDL-3 + CXM 1978

The Eardrill Morphun is sequencing the Buchla 258d sine/square wave oscillator. I’m playing the Synthetic Sound Labs 3650 manually to control the pitch of the 258d sine/saw wave. Eventually I insert a cycle from the 281 into the Morphun reset jack, which randomizes and disrupts the sequential loop. The sine/saw VCO runs through the 292r, with the gated sine/saw signal panned center on the Mackie Onyx 1640 mixer, while the gated sine/square signal runs through the JRB VCBF filter, modulated by the 281, then through the 292 into the Peavey DDL-3 delay, with the direct output panned slightly right on the Mackie and the delayed output panned left. All three signals have some stereo reverb blended on the CXM 1978."

Weight upon us

video upload by MIDERA

"Sequential OB-6 and Fractal Audio FM3

#sequential #ob6 #fractalaudiofm3"

SEQUENTIAL TAKE 5 ANALOGUE POLYSYNTH

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

via this listing

Additional Signal Sounds listings

Cathartic winter synth jam - "Expanse Part 1"

video upload by Hazel Mills

"If, like me, you're in winter hibernation mode, join me here and melt into this (unedited) evolving, analog, massive hug of a soundscape. This video actually came to be because I've been re-jigging my studio set-up and was testing a gear combo (listed below)."

Sequential Circuits Prophet 6
Echo Fix Spring Reverb
Echo Fix Chorus Vibrato
Vongon Polyphrase
Vongon Ultrasheer


Happy Jamuary ;-)

Small Town Boy/Bronski Beat (Circuit Tracks version)

video upload by Guinan

"Feeling a bit of 80’s nostalgia ('Stranger Things' anyone?) I thought the time had finally come to try and give this classic electro-pop anthem the Circuit Tracks treatment. Released in 1984 (40+ years!) it’s too easy to forget how ground-breaking the song (and it’s subject) was in the political climate of the Eighties.

The song itself is a simple but almost perfect pop song. It was programmed on an MC-202 Microcomposer and is reputed to have started life as an electronic disco version of the Sex Pistol’s 'Pretty Vacant'!

Yamaha DX7 is used heavily on the track (notably the presets ‘Harp1’ and ‘Bass1’), and additional Sequential Pro-One, Memorymoog and Linn drums. I managed to simplify the arrangement to program everything and the vocals into a single Novation Circuit Tracks. Everything you hear is being played and recorded live from the Tracks.

I'm pleased at how close to the spirit of the original I managed to get this time. I hope you enjoy the track and it brings back some memories for you too."

"More details for synth nerds
BPM 135
I don’t own a DX7 (sadly!) but the closest thing I have is emulation. The repeated ‘Harp1’ DX7 line (and the ‘Marimba’ break) was sequenced on the Tracks MIDI 1 and sampled as 4-bar loops from the internal MicroDEXED emulator in an M-Vave SMK-37 Pro keyboard. Each sample was then triggered (like a drum sound) at the required point in the song using the Drum 3 track.

CLICK FOR MORE »

BEHRINGER PRO 800 Demo & Review (Amazingly Cheap PROPHET Synth)

video upload by Woody Piano Shack

"Demo and Review of the BEHRINGER PRO-800 Analog Synth, a recreation of the SEQUENTIAL CIRCUITS PROPHET 5 and PROPHET 600.

Lesson packs also available for one-time purchase on Patreon.

MORE WOODY PIANO SHACK
https://woodypianoshack.com"

How we have fallen

video upload by MIDERA

"Terrible things are happening outside. Poor helpless people are being dragged out of their homes. Families are torn apart. Men, women, and children are separated. Children come home from school to find that their parents have disappeared."

Anne Frank

Sequential (DSI) OB-6 and Fractal Audio FM3

#ob6 #sequential #fractalaudiofm3"

Dawn Chorus(Cover) | Sequential – Fourm

video upload by w24

Crystal Rain ( Track) - #moog #sequential #prophet #nativeinstruments

video upload by SMV Producer

Sound banks available for purchase at: https://gumroad.com/smvproducer

Other links:
Bandcamp : https://sergiomassimilianovarvazzo.ba...
Instagram: / smv_producer
Smartlink: https://ffm.bio/smv_producer

Permida - Glitch Mode

video upload by Tre Modular

"This video dives into the unstable, twitchy, and glitchy side of Permida.

Permida is a 3-part utility module with a Sequential switch, Voltage-controlled switch, and Max value selector.

We have already released a demo video of how this module behaves normally. Now it’s time to explore what happens when you push Permida past its comfort zone:
VC switch jitter when riding the decision boundary
Sequential switch instability at its clock rate limits.
Max selector behavior with floating inputs.

These are the natural edge behaviors of analog circuits. And they open up new possibilities for chaotic rhythms and glitch textures.

Permida is polite when you want it to be. But if you push it, it reveals a different character.

www.tremodular.com"

Sequential Forum Shorts by Tatsuhiko iino

video uploads by Tatsuhiko iino

Playlist:

1. SEQUENTIAL FOURM × LINE6 EchoPark #sequential #sequentialfourm #synthesizer #line6
2. SEQUENTIAL FOURM × VONGON ULTRASHEER #sequential #sequentialfourm #synthesizer #vongon
3. SEQUENTIAL FOURM × chase bliss MOOD Mk-2 #sequential #synthesizer #sequentialfourm #chasebliss
4. SEQUENTIAL FOURM × VONGON ULTRASHEER #sequential #synthesizer #sequentialfourm #vongon