MATRIXSYNTH: DSI

Wednesday, January 21, 2026

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.]

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."

Tuesday, January 20, 2026

DSI Tempest Only - Analog Melodic Track


video upload by itramtal

Monday, January 19, 2026

Marty Supreme Inspired 80s Track with the Juno 60


video upload by the nightwater

"Someone just saw Marty Supreme 😂. Trying to be like OPN with the 80s sounds. Quick jam with the Roland Juno 60 and the Dave Smith Tempest. Some reverb from the Strymon Bigsky Mx."

Monday, January 12, 2026

UDO Super 6 & Juno 60


video upload by the nightwater

"Quick jam sending a sequence out to the UDO Super 6 and using the Juno 60 for the arp at the end. Moog Mother 32 on bass, Dave Smith Tempest on drums, GFi Specular Tempus & Strymon Bigsky Mx on effects."

Friday, January 09, 2026

Sleepy Ambient with Prophet 12, Moog Muse, Pro 2 and Eurorack Modular


video upload by copenhagennoiselab

"This is a live session with some of my favourite synthesisers at the moment. The slow noise is a noise generator into Frap Tools Fumana filterbank, modulated by a Pam's Pro Workout and effected by Empress Euroburo Zoia and Strymon Starlab. The rhythmic noise is a sequenced patch on the Sequential Pro 2 through a Boss SL20 slicer. The Moog Muse is playing a slow pattern arpeggio through an Eventide Modfactor and on top of that I play the Prophet 12 through an Eventide H9 (blackhole algoritm).

This is an unedited take on what I usually do in my studio to relax. Usually it is never recorded. But as it is friday, and a new year has started, let's just do it a bit different, ey?

Outside we have more snow than I ever experienced here in Denmark, so the music kind of reflects that cold but cosy mood.

I hope you enjoy it."

Thursday, January 08, 2026

green piano


video upload by itramtal

DSI Pro 2 & Korg SV-1

Sunday, December 28, 2025

Dave Smith Instruments Mopho SE Analog Leads Bass FX Synthesizer Rik Marston


video upload by Rik Marston Official

"Dave Smith Instruments - Mopho SE - Analog Leads Bass FX"
Synthesizer Demo by Rik Marston
*Watch in HD!* *NO Talking!* *Turn it up!*
My Etsy store: AhnyxianSoundDesign
https://www.etsy.com/shop/AhnyxianSou...

Low Energy, High Frequency, moog minimoog, prophet 6 & tempest


video upload by itramtal

"‪@itramtal‬ jam with moog minimoog , sequential prophet 6 & tempest drum machine"

DSI POLY EVOLVER KEYBOARD // EVOLVING // No Talking // Sequential Circuits


video upload by LESINDES

"Evolving AMBIENT atmo DSI/SEQUENTIAL POLY EVOLVER"

Saturday, December 20, 2025

electrifying beats with dsi tempest


video upload by itramtal

Thursday, December 18, 2025

dsi tempest techno


video upload by itramtal

Monday, December 15, 2025

UDO Super 6 Melodic Electronic IDM Song


video upload by the nightwater

"I was planning on making a quick simple sequence on the UDO Super 6 but ended up building it out into a full song and it turned out pretty nice. Lead melody and Pads are the UDO Super 6. Bass is the Moog Mother 32. Drums are the Dave Smith Tempest. Effects from the Strymon Bigsky Mx and the GFI Specular Tempus."

Thursday, December 11, 2025

dsi tempest returns


video upload by itramtal

Wednesday, December 10, 2025

Occasionally The Synth Plays Me


video upload by Chammssss

"Dave Smith Poly Evolver fun!"

Monday, December 08, 2025

Prophet 12 digital-analog hybrid synth patch demos | no talking


video upload by Mamotreco

"Playing and tweaking through several presets on the Dave Smith Instruments Prophet 12 Desktop synth. Hear how the combination of digital oscillators and analog filters sounds.

https://mamotreco.com

Current channel music compilation: https://mamotreco.bandcamp.com
Previous music releases available here: https://synthandsundry.bandcamp.com"

Sunday, December 07, 2025

Dave Smith Instruments Prophet 08 PE Analog Keyboard Synthesizer SN 01994

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


via this listing

Additional Perfect Circuit listings

Dave Smith Instruments Pro-2 Paraphonic Hybrid Synthesizer

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


via this listing

Additional Perfect Circuit listings

Thursday, December 04, 2025

Dave Smith Instruments Poly Evolver Synthesizer Brochure

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


via this eBay listing

"Dave Smith Instruments, Poly Evolver Synthesizer BROCHURE ONLY. With Evolver Sticker included. Dave Smith the designer and creator of Sequential Circuits. Full color brochure of the Poly Evolver keyboard and rack. The brochure is 2 page, front and back. Vintage original. Excellent condition."

Sunday, November 30, 2025

Korg Monopoly


video upload by the nightwater

"Quick jam on the Korg Monopoly. Sending a sequence from the Elektron analog keys. Some reverb from the Strymon Bigsky Mx. Drums Dave Smith Tempest."
NEXT PAGE HOME



Switched On Make Synthesizer Evolution Vintage Synthesizers Creating Sound Fundlementals of Synthesizer Programming Kraftwerk

© Matrixsynth - All posts are presented here for informative, historical and educative purposes as applicable within fair use.
MATRIXSYNTH is supported by affiliate links that use cookies to track clickthroughs and sales. See the privacy policy for details.
MATRIXSYNTH - EVERYTHING SYNTH