With all the recent interest in obsolete music software—especially ReBirth RB-338—I wanted to make sure an old piece of the community doesn't disappear.

For years, this server has held a directory of 300+ ReBirth v2 mods made by users from the early Propellerhead community. I always meant to build a proper page to share them, but never quite got around to it. We kept sharing them through the old Hotline server instead, which stayed active until about a decade ago.

But today is 303 Day, so it feels like the right moment to finally put this out there:

https://github.com/peffre/ReBirth-RB-338

This archive includes a mix of material—some mods were official releases once featured on the Propellerhead website, and others were unfinished experiments that never really made it out into the world. Either way, there's a lot here.

If you're a newer ReBirth enthusiast running RB-338 on vintage hardware (or in emulation), there are tons of sounds, ideas, and inspiration to dig through in this collection.

A Note About the Server

This website has been running on the same server for about 25 years, which is kind of amazing in internet terms. Thanks to the generosity of my hosting provider, we've kept this machine alive for as long as possible (yes—still a single box sitting in a data center in Delaware). That said, the time has come to move on from some vintage internet technology. In about a month, the server will be physically removed from the data center.

The website will be moving to a new service, and while the format may change, **the archive will remain available**.

Thank You!

Many thanks to all the friends who have been part of this journey over the years. What started as a great online community grew into real friendships, and I'm deeply grateful for that.

At the International Museum of Surgical Science in Chicago, IL, a special exhibition is currently running with the personal effects and film memorabilia of the surrealist filmmaker, Luis Bunuel. Part of this exhibit features a dream room where a series of my quadraphonic compositions continuously run. These commissions are crafted from audio tracks of Bunuel films and a variety of synthesizers (including Buchla, 3rd Wave, minimoog, prophet-5, pro-3) and software tools (Reason and Logic). The exhibit will run through February 2026, and there may be something special for the closing.

Luis Bunuel is regarded as one of the most influential creative geniuses of the twentieth century. His works pushed the boundaries of the social conventions and established the foundations of surrealist cinema. The body of his work has been critically acclaimed and received awards from Cannes, BAFTA, the Motion Picture Academy, and others. Bunuel’s journey spans decades, from his early work Un Chien Andalou (1929), to Los Olividados (1950), to The Exterminating Angel (1962), to his later works such as The Discrete Charm of the Bourgeoisie (1972) and That Obscure Object of Desire (1977).

Bunuel films are not necessarily for the faint of heart. These were crafted in a time that was not as driven by consumption and feel good vibes, when pushing the limits of new media for art was still valued. Many of these works are observations of religious and social norms of the era, and compelled audiences to submit to the Socratic tenet of examining their own belief structures.

These philosophically challenging themes are what make me a fan of Bunuel, but I also have a deep appreciation for his use of sound as subliminal narrative devices. The sound design is not overly complex in these films, especially by comparison to modern productions, but the cues carry certain positivistic meanings that convey deeper meaning which at the same time can challenge an audience’s subjective understanding of the visual experience.

Director of the Luis Bunuel Film Institute, Oscar Arce and I have been brainstorming ideas for an interactive retrospective that would incorporate the films with immersive sound that would tap into the tradition of avant-garde surrealism. Finally these ideas have manifested into their first iteration of the installation in Chicago.

The founder of Groove Synthesis, Bob Coover, is someone I’ve known for a very long time. We go back a few decades, to a time when small production studios were just coming in fashion. This is the era when we were a little overambitious and thought that a cheap prosumer digital tapes machine could do the same work as a 2”-24 Track. We had lost touch for a decade or so, but as fate would have it, we reconnected when Dave Smith brought us on to work on the Prophet-12 Synthesizer.

About 6 years ago, Bob pulled me aside at the NAMM show and said that he had the idea of creating a modern PPG style synth. Around that time, he was working on the dsp engine for the Sequential Pro-3 which has a wavetable oscillator, and this sparked the idea of fulfilling a dream of re-imagining the PPG as a modern instrument. This idea would ultimately become the 3rd Wave Advanced Wavetable Synth - a 24 Voice beast with three digital oscillators and 24 Analog filters.

The first prototype 3rd Wave I received was a 16-voice unit with a body design that differed from the production model. The control panel was identical, but the chassis had a flattened upper section reminiscent of the classic PPG silhouette. It was on this unit that I began developing the factory presets and wavetables. Programming sounds for the 3rd Wave came rather naturally as nearly every parameter is accessible from the front panel-This is one of the instrument’s most praised qualities. While its architecture is deep and sometimes requires menu diving, you rarely need to dive far to tweak a sound.

Earlier this year, we began work on the 3rd Wave 8M, an eight-voice desktop module. It features the same sound engine and parameter set as the 24-voice keyboard and desktop models but introduces a fresh user interface with a larger screen, more soft-knob controls, and a streamlined control panel. While the interface is pared down compared to the flagship 24V keyboard, the layout of the main controls and display makes patch editing straightforward.

The 8M is largely compatible with 24V programs, but with its eight-voice limit and two-part multitimbrality, we had to completely rework the factory sound set. Four-part multitimbral patches were condensed to two, and 24-voice unison programs were adapted for an 8 voice instrument. There were many programs with demo sequences that exceeded 8 voices, and these had to be redone as well. Additionally, we introduced several sample-based programs—something not included in the original 3rd Wave specification. A lot of this work was accomplished using the 8M rather than the keyboard, and I have to admit in some ways, the user experience felt quite good. While there is a bit more menu diving, the large screen makes this much easier compared to the smaller display on the 24V units.

Looking back, it’s been a rare privilege to watch this idea grow from a conversation at NAMM into a family of instruments in the hands of musicians everywhere. Each iteration—whether the first 16-voice prototype, the flagship 24V, or the new 8M—has carried that original spark forward in its own way. For me, the most rewarding part has been shaping the sound design along the journey and hearing how players take these tools in directions we never could have predicted.

In 2021, Patricia Strange invited me to contribute a testimonial for the new pressing of Electronic Music: Systems, Techniques, and Controls, written by her late husband, Allen Strange.

At the time, I was only familiar with Strange’s Programming and Metaprogramming in the Electro-Organism: An Operating Directive for the Music Easel. Thanks to the generosity of the Buchla Archives, I had the chance to explore the first edition of Electronic Music. As I read, what resonated most is how the book bridges artistry with the technical fundamentals central to performing electronic instruments.

Later that year, I was asked to perform on my Buchla system at an event in San Jose, CA. The venue was just a few steps away from the campus where Allen Strange had established the electronic music studio at San Jose State University, and while developing the piece I was inspired by the significance of this location in the history of electronic music. This connection became a guiding influence in shaping the composition.

In the closing of Electronic Music, Allen Strange offers this observation:

“A single momentary sound may be the result of three or four hours of re-patching and re-recording… the perceiver cannot hear the amount of time and planning spent on the production of an event. As listeners, we don’t judge the aesthetic content of a composition by the time spent on its creation, but rather by its sonic information.” This passage inspired the title of the work.

The Buchla system used for this performance features a combination of older 200 Series modules from the 1970s, as well as 200 and 200e Series modules from the 2000s, and newer 200e modules from the 2010s. The system also incorporates a Studio.h dual prismatic oscillator, and certain sections were further embellished with additional parts from a vintage Buchla Music Easel, and a Buchla 265 Source of Uncertainty module.

While the performance is not without flaws, the capricious nature of the instrument imbues the composition’s simple structures with a uniquely unpredictable quality.

A Single Momentary Sound is now available to stream on Bandcamp Quadraphonic version available for download

Even as I compose this entry, development and final tweaks to the Oberheim OB-X8 are probably still on going. Of all of the hardware projects I’ve been involved with over the past few years, this one has gone through the most rigorous development in an effort to faithfully reproduce the sound of the vintage Oberheim synths. Keep in mind that the OB-X8 is a successor to the OB-X, the OB-Xa, and the OB-8. Essentially, there are three instrument systems that are being reproduced and packaged into one new keyboard. Pictured above is the prototype unit that I worked with to develop programs for the instrument. The knobs in the photo are not the final version which are reproductions of the classic skirted type.

Late last year, I dug up my old OB-8 and opened it up for some much needed maintenance. The filters were in need of calibration and the keybed required some cleaning, and after a bit of TLC it played great. The Oberheim/Sequential development team borrowed this unit for analysis. More importantly, Marcus Ryle is involved, and he has all of the institutional knowledge of how the instruments were designed, built, modified, and operated.

The original factory presets will ship with the OB-X8, and they sound exactly like they did decades ago. Listening to these presets is incredibly nostalgic since you can find sounds used by Prince, Van Halen, The Cars, Thompson Twins, etc. etc. It’s pretty amazing how many hit songs used an Oberheim.

There are some new features accessed through an updated Page 2 menu, the OB-X8 preset specs incorporate these features, especially velocity and aftertouch. You can control Xmod intensity and oscillator levels, and noise generator level, which expands the range of timbral generation quite a bit beyond the original OBs. There are also panning functions for stereo presets which adds a little something extra to the bank of sounds. Because there are different envelope and LFO responses between the original instruments, one of the features allows you to mix and match these settings as well.

Below is an audio demo of the programs I’ve created for the OB-X8. Since the instrument does not have built in effects, I’m running the instrument through a Strymon Big Sky and switch in/out reverb to provide a bit of comparison on how it sounds effected vs. dry.

Here’s the new TAKE 5 synthesizer from Dave Smith and the guys at Sequential. It’s a five voice polyphonic analog keyboard with all of the cool features of the Prophet 6 and the filter circuitry of the Prophet 5 Rev 4, but it’s housed in a smaller chassis with a smaller keyboard. Personally I’m pretty surprised about how nice this instrument sounds. It has the all of the “bread and butter” features of an analog poly, but it plays like one of the T5’s bigger cousins.

Pictured above is the prototype T5 used by us who voice the unit and beta test. It’s missing the end caps and the layout is slightly different than production unit. It has similar profile to the Sequential Pro3 and the knobs and buttons are identical.

The general layout of the panel is pretty intuitive, and in some ways it has the vibe of a Roland Juno-106. It’s really easy to navigate and program and dial up a sound quickly. While there can be some menu diving to get deeper into mod routings, you don’t need to go down that path to get some very satisfying results. The T5 has far less program memory than other Sequential instruments, so users may need to learn how to perform sysex dumps to archive program banks.

Those of you who are familiar with the Sequential modulation routing environment will find that features have been changed to accommodate the reduction in features. For example there are two LFO modulation sources. One is per voice while the other is global. Some of the modulation targets are polyphonic per voice, however some targets are monophonic. Sources and Targets are noted with a [P] for polyphonic or an [M] for monophonic. Depending on how modulations are routed between Poly and Mono points, the voicing may result in sounds that have paraphonic characteristics.

The ID700 from modosc designs is a 12 voice digital synthesizer based on the Instrument Designer architecture of the Buchla 700. The voicing structure is predominantly algorithmic FM, however it is FM that is combined with programmable waveshaping. There are several algorithms that are configured for common 2, 3, and 4 op FM roots, stacks, branches, however the combined FM sources are always processed through a look up table that adds more timbral flexibility. Even a single sine wave generator without frequency modulation can be transformed into a pulse wave through the wave shape functions. Additionally there is a type of Amplitude Modulation routing which can be configured as a kind of timbral modulation. This is all quite different from DX-style FM synthesis. For those who are familiar with Buchla 200e systems, the routing and controls are more like the 259e Twisted Waveform Generator, and the 261e Complex Waveform Generator. In fact there are controls for Morph between two wave shaper signal paths, and index controls, very much like the 259e.

A few audio demos of these presets can be heard here: modosc designs ID700 presets

Jonathan Schatz first gave me a demo of this project in 2018, and I’ve been eagerly awaiting it’s arrival. Needless to say I was ready to drop the banana cables when he asked me to help him with voicing ID700. Bear in mind, I have no experience using an original Buchla 700. I’ve heard recordings from Benge and Shasta Cults, and I’ve had the opportunity to see Alessandro Cortini’s 700 in real life. My approach to programming ID700 is based solely on an interpretation of the system as presented: Four oscillators, two wave shapers, index controls (mod amounts), modulation envelopes, a low pass filter, crossfader, and panning—configured in twelve routing schemes. Whether or not ID700 is a true emulation of the Buchla 700 doesn’t really matter, however the architecture does command a workflow that feels like Buchla. And at times it really does have timbral qualities similar to a 259e and even at times it can sound like a Buchla complex waveform generator.

ID700 is currently only available for iPad: ID700 on the App Store

One side project that emerged during the voicing project was the incorporation of the Sensel Morph. Using the Innovator’s overlay, i mocked up a control surface inspired by the Buchla 700. The sliders are mapped to control the main algorithm parameters and a 24 key MPE keyboard sends note on, pressure, and CC74 messages. The XY pad and long pot are mapped to various CC messages, and other controls include algorithm switching, time scale adjustment, sustain pedal, and midi panic. For those interested in trying out the map with the Sensel innovator’s overlay, you can download the files here:

ID700_Morph_Overlay.zip

<img src=“https://cdn.peff.com/images/journal20/prophet5rev4prototype.jpg”width=“100%” />

2020 needs some good news… and Dave Smith has been working hard to bring it to you!

Sequential announces the return of the Prophet~5!

Decades after the last P5 Rev 3s shipped, the new Rev 4 features the same fundamental features with improvements to modulation and MIDI implementation. Rev 4 also has a “Vintage” control that modifies the response to simulate characteristics of different generations from Rev 1 to Rev 4.

Programming a Rev 4 is the same as a vintage Prophet~5, so this voicing project was fairly straightforward. The modulation routings are limited, so programming relies on application of poly-mod, envelopes, oscillator detuning, waveshape selection, etc. Even with the limitations, the Rev 4 Poly Mod is vastly improved from a Rev 3 which makes it easy to start with FM tones as the basis of subtractive synthesis sounds.

I have a Rev 3.3, and other than having the issue with bushings and stuck keys, it’s stable and still sounds great. It’s currently at Sequential with other vintage Rev 1s, Rev 2s, and Rev 3s that have been analyzed to develop the “Vintage” control feature.

The burning question is “Does it sound like the original?”
My answer is “kinda.”

There are always going to be slight differences in tonality between analog instruments. It’s just part of the nature of electronic components and time, so any comparison between the Rev 4 and older Prophet5s is generalized. So yes, it generally sounds like my Rev 3. Thick bass patches and rich pads sound like a classic Prophet5, but as I mentioned before, Poly Mod opens up the instrument to a wider palette of timbres.

It’s not exactly the same though. The Rev4 has a lower noise floor, and you don’t hear the transformer humming inside the unit. And the modern key bed doesn’t click when you play.

Many creatives seem to have adapted well to the unexpected conditions of 2020 and managed to be incredibly productive under these incredible circumstances. Other obligations occupy most of my time these days and have not had the time or energy to be creative, but I have been enjoying listening to some the great releases from friends and colleagues.

In the little spare time available, I’ve been taking care of some digital housekeeping and finally managed to post up audio from my performance at Synthplex 2019. This is a performance on a Buchla system presented in quadraphonic sound. The only recording from the event is a two channel capture from the A/V team controlling the visuals and sound.

The patch was structured in five parts that build through a range of tonal and atonal techniques. It was not a fully preprogrammed performance, and because the patch relies on the Buchla 272e FM tuner module, there’s a risk factor involved in trying to play off whatever signals are flowing through the ether. Frankly, this performance was not the best representation of what the patch can sound like. There was no soundcheck, and I didn’t have time to get all of the initial settings for the patch dialed in, and I struggled during the first two sections to get things together (and in tune). Finally about half way through during the third movement, things started flowing well and I was pretty happy with the last sections.

I recently completed a voicing assignment for the new Pro 3 synthesizer from Sequential. This is their new mono synth that carries on the tradition of the legendary Pro 1 and popular Pro 2, but the Pro 3 mixes things up a bit by incorporating a wavetable oscillator along with two analog oscillators. The filter section has three selectable types including popular low pass circuits and the Oberheim SEM filter circuit. Pictured above is the prototype unit used for developing factory programs for the instrument.

For several months now, I have had the opportunity to experiment with prototype and see the instrument become complete. Sequential asked if I could contribute some tables, and I was little reluctant. Other than generating basic mathematical functions as LUTs, I don’t have much experience developing wavetables, unlike the hardcore experts, Robert Rich and Drew Neumann. They created the real bread and butter wavetables included in the Pro 3. The Sequential Team and Dave gave me some room to just experiment a bit and see if I could come up with anything usable.

There are no commercial products available for the specific task of developing wavetables. While any decent editing application would work, I wanted something that would let me control windowing and audition at different playback rates to simulate oscillator scan rates. I ended up making a max/msp patch that allowed me to import and time compress audio files, make small edits and modulate harmonics, then export to WAV files for transfer to the Pro 3. While it was pretty easy to create some basic tables, the content from Drew and Robert was superior to what I was producing.

I ended up going back to my 808 sample library and flew in the bass drum, the snare drum, the clap, cowbell, hi hat, etc. After massaging the sounds a bit, we imported them as a 16 individual tables into the Pro 3 and what started coming out was completely different from anything we’ve heard before. It was like a weird revelation that a crude 1024 sample file could still capture the vibe of an iconic sound which could then become a voice in synthesizer patch.

The “Sequential” wavetable is a sample of my voice. This was another experiment to see if it would be possible to create a set of speech based wavetables that could be modulated to say something … and still be somewhat musically useful in timbre generation. I don’t know about the latter objective, but it was an interesting challenge to pick out the right sections of a sample that would intelligibly reproduce consonants and vowels when scrolling through the 16 wavetable sections.

On the surface, the Pro 3 seems like “just another subtractive monosynth,” but it’s pretty surprising the range of sounds you can create with this combination of nice analog oscillators and the wavetables. All of the classic monosynth type sounds are easily available, but with the flexible mod sources and routings, the sequencer, and effects, the results seem like this is more than just one voice.

Happy 808 Day!

I’ve been testing the Rossum Electro Music Linnaeus multimode filter module which is going into production this week. Since it’s 808 day, i figured it would be interesting to see how it treats some classic electronic drum sounds. Linnaeus is a stereo module and you can invert the modulation of the two channels to create stereo imaging effects. There’s also a linear FM feature, including a modulation oscillator (with selectable waveforms). When the filter is in self oscillation, you can create “Chowning” style ringing tones, or absolutely destroy a tone being processed through the filter.

The 808 Bass Drum is isolated and running through the Rossum Evolution, and the 808 Accent trigger is pulsing Control Forge which has a random stepped voltage sequence which is patched to both Evolution and Linnaeus.

Synthplex begins in two weeks! This is new synthesizer event in Burbank, CA that features exhibitors, panels, DIY builder sessions, and electronic music performances. I’m scheduled to do a set on Friday, March 29th and will be using the Buchla with a nice quadraphonic sound system!

Tickets and more information are available on the website:

Synthplex.com