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Prophet-5
A Prophet-10 Rev 4, a modern re-issue of the Prophet-5
ManufacturerSequential
Dates1978–84, 2020– (Prophet-5)
1977,[1] 1981–84, 2020– (Prophet-10)
PriceUS$3,995 (Rev 1, 2)
US$4,595 (Rev 3.x)
US$3,499 (Rev 4, 5-voice, 2020)[2]
US$4,299 (Rev 4, 10-voice, 2020)[2]
Technical specifications
Polyphony5 voices (Prophet-5)
10 voices (Prophet-10)
TimbralityMonotimbral (Prophet-5)
Multitimbral (Prophet-10)
Oscillator2 VCOs per voice
LFO1
Synthesis typeAnalog subtractive
Analog FM (Poly-Mod)
Filter4-pole resonant low-pass
Aftertouch expressionRev1 to Rev3 no, Rev4 yes
Velocity expressionRev1 to Rev3 no, Rev4 yes
Storage memory40 patches (Rev 3 120, Rev 4 200)
EffectsNone
Input/output
Keyboard61 keys (Prophet-5 (all versions), Prophet-10 (1977, withdrawn from production)
(Prophet-10 (1981-84)) Dual manual 61 key
Left-hand controlPitch and modulation wheels
External controlCV/Gate
Proprietary serial interface
MIDI (Rev 3.3)

The Prophet-5 is an analog synthesizer manufactured by the American company Sequential. It was designed by Dave Smith and John Bowen in 1977. It was the first polyphonic synthesizer with fully programmable memory.

Before the Prophet-5, synthesizers required users to adjust controls to change sounds, with no guarantee of exactly recreating a sound. Sequential used microprocessors to allow users to recall sounds instantly rather than having to recreate them manually. The Prophet-5 facilitated a move from synthesizers creating unpredictable sounds to producing "a standard package of familiar sounds".[3]: 385 

The Prophet-5 became a market leader and was widely used in popular music and film soundtracks. In 1981, Sequential released a 10-voice, double-keyboard version, the Prophet-10. Sequential introduced new versions in 2020, and it has been emulated in software synthesizers and hardware. Sequential also released several further Prophet synthesizers, such as the Prophet '08.

Development

[edit]
"Twice Around the Sun"
From the 1987 jazz album Ecotopia by the band Oregon, this song starts with the Prophet-10 played solo by Ralph Towner. He is joined at ten seconds by Paul McCandless on soprano saxophone, with synth and horn each repeating the theme. Bass and percussion come in at 20 seconds.
Problems playing this file? See media help.

The Prophet-5 was created in 1977 by the American engineers Dave Smith and John Bowen at Sequential Circuits.[1] At the time, Smith had a full-time job working with microprocessors, a new technology. Smith conceived the idea of combining them with synthesizer chips to create a programmable synthesizer; this would allow users to save sounds to memory, rather than having to recreate them manually.[4] He did not pursue the idea, assuming Moog or ARP would design the instrument first.[4] When no instrument emerged, in early 1977, Smith quit his job to work full-time on the idea.[4]

Initially, Smith and Bowen developed the Prophet-10, a synthesizer with ten voices of polyphony. However, it was unstable and quickly overheated, creating tuning problems. Smith and Bowen removed half the electronics, reducing the voices to five and creating the Prophet-5.[1] Smith demonstrated the Prophet-5 at the NAMM Convention in January 1978 and shipped the first models later that year.[5]

Production

[edit]

Three versions were built between 1978 and 1984. The first, Revision 1, was hand-assembled and produced quickly to generate initial revenue; only 182 were made. Revision 2 was mass-produced in quantities over 1,000; this model was more robust, added cassette patch storage, and replaced the koa wood casing with walnut.[1] Revision 3 replaced the Solid State Music (SSM) chipset with Curtis (CEM) chips, necessitating a major redesign. According to Sound on Sound, Revision 3 "remained impressive and pleasant to play, but was slightly cold and featureless by comparison to earlier models".[1] Almost 6,000 Revision 3 models were produced.[1]

In the Prophet-10, a pair of Prophet-5 sound boards provide ten voices

In 1981, Sequential Circuits released the Prophet-10, featuring 10 voices, 20 oscillators, and a double manual keyboard. Like the Prophet-5 Revision 3, it uses CEM chips.[1] The first Prophet-10s used an Exatron Stringy Floppy drive for saving patches and storing sequencer data. Sequential later moved to a Braemar tape drive, which was more reliable and could store about four times as many sequencer events.[1]

In 2020, Sequential released a new version, the Prophet-5 Rev4, with additional memory and features. They also released a new version of the Prophet-10, with the same external design as the Prophet-5.[2][6][7]

Features

[edit]

Unlike its nearest competitor in the 1970s, the Yamaha CS-80, the Prophet-5 has patch memory, allowing users to store sounds rather than having to reprogram them manually.[8] It has a proprietary serial interface that allows the user to play using the Prophet Remote, a sling-style keytar controller; the interface cannot connect the Prophet-5 to other devices. Sequential produced a MIDI interface that could be retrofitted to later Prophet-5 models. Third-party MIDI interfaces have also been offered.[1]

Impact

[edit]

Before the Prophet-5, synthesizers required users to adjust cables and knobs to change sounds, with no guarantee of exactly recreating a sound.[3] The Prophet-5, with its ability to save sounds to patch memory, facilitated a move from synthesizers creating unpredictable sounds to producing "a standard package of familiar sounds".[3]: 385  The Prophet-5 became a market leader and industry standard.[9] According to MusicRadar, the Prophet-5 "changed the world – simple as that".[10]

The Cars keyboardist Greg Hawkes used the Prophet-5 for the hits "Let's Go" (1979) and "Shake It Up" (1981).[11] Kraftwerk used it on their 1981 "Computer World" Tour,[12] and Phil Collins used it on his 1981 single "In the Air Tonight".[13] Japan used it frequently, such as on their 1982 hit single "Ghosts".[14] Michael Jackson used it extensively on Thriller (1982), and Madonna used it on Like a Virgin (1984).[9] Peter Gabriel considered the Prophet-5 his "old warhorse", using it for many sounds on his 1986 album So.[15] Brad Fiedel used a Prophet-10 to record the soundtrack for The Terminator (1984),[16] and the filmmaker John Carpenter used both the Prophet-5 and Prophet-10 extensively for his soundtracks.[17] The Greek composer Vangelis used the Prophet-5 and the Prophet-10, such as in the soundtrack of Blade Runner (1982).[18][19] Radiohead used it on their 2000 album Kid A, on songs including "Everything In Its Right Place".[20] Other users include Tears for Fears, Thompson Twins, Thomas Dolby, Devo, Eurythmics, Soft Cell, Vince Clarke, Pet Shop Boys,[21] Giorgio Moroder,[21] Tony Banks,[22] Tangerine Dream,[21] Jean-Michel Jarre,[21] Dr. Dre,[9] Richard Wright of Pink Floyd,[23] Rick Wakeman,[24] Pendulum,[25] BT[26] and John Harrison.[9][5]

Successors and emulations

[edit]
Sequential Prophet-6 (2015)

Smith's companies released several synthesizers with the Prophet name, including the Pro-One,[27] the Prophet VS,[28] the Prophet '08[29] and the Prophet-6.[30] They also released samplers, such as the Prophet 2000 and the Prophet 3000.[31][32] In 2020, Sequential announced a new version of the Prophet-5, the Rev 4. It adds features including USB and MIDI connectivity, velocity and aftertouch sensitivity, polyphonic glide, and two sets of filters.[6] Sequential also announced a new Prophet-10 Rev 4, a ten-voice version of the Prophet-5 Rev 4.[7]

Bowen provided consultation for Native Instruments during the development of the Pro 5 software synthesizer emulation, released in 1999. It was followed by the Pro 52 in 2000 and the Pro 53 in 2003.[33][34][35] Bowen also provided consultation for Creamware for their 2003 software emulations, the Prophet and Prophet Plus.[35] Arturia, U-he and Softube released emulations in 2006, 2018 and 2023.[28][36][37]

Other hardware clones include the upcoming Behringer Pro-16 (prototype revealed at NAMM 2025), and PikoPiko Factory's open-source Profree-4, released in 2022.[38][39][40]

References

[edit]

Further reading

[edit]
[edit]
Revisions and contributorsEdit on WikipediaRead on Wikipedia

Prophet-5

View on Grokipedia
from Grokipedia
The Prophet-5 is a five-voice polyphonic introduced in 1978 by Sequential Circuits, recognized as the world's first fully programmable polyphonic that enabled musicians to store and recall sounds via control. Developed by engineers Dave Smith and John Bowen, who founded Sequential Circuits in 1974, the Prophet-5 marked a pivotal advancement in electronic instrument design by combining —allowing multiple notes to be played simultaneously—with patch memory, overcoming the limitations of earlier monophonic synthesizers like the . Its core architecture featured two Curtis CEM 3340 voltage-controlled oscillators (VCOs) per voice, a multimode filter (initially SSM 2040 in early revisions, later Curtis CEM 3320), and a polyphonic modulation section that included , cross-modulation, and control for versatile sound creation. The instrument's warm, organic tone, derived from discrete analog circuitry, made it a staple in studios during the late and . Over its original production from to , the Prophet-5 evolved through three revisions: Rev1 and Rev2 used SSM filter chips for a brighter character, while Rev3 adopted filters for smoother resonance, along with enhanced stability and MIDI precursors. Each version included 40 factory presets, expandable via cartridge, and supported real-time performance with a five-octave keyboard. The synthesizer's portability and programmability transformed recording workflows, as evidenced by its use on landmark tracks such as ' "Let's Go" in 1979 and ' "I Can't Go for That" in 1981. In the , Sequential (formerly Sequential Circuits) reissued the Prophet-5 in as the Rev4, faithfully recreating all three original filter designs via a switchable "" knob, while adding contemporary features like velocity and aftertouch sensitivity, USB//CV connectivity, and up to 400 programs. This reissue, along with a companion Prophet-10 model offering ten voices and bi-timbrality, preserves the instrument's legacy for new generations, underscoring its enduring influence on electronic music production. Artists including and famously employed the original Prophet-5 to define the sound of pop and rock in the .

History

Development

The Prophet-5 was conceived in 1977 by Dave Smith, founder of Sequential Circuits, and his collaborator John Bowen, who sought to create the first commercially viable polyphonic analog synthesizer with microprocessor-based patch storage to address the limitations of monophonic instruments like the , which required manual reprogramming for each sound. Their motivation stemmed from the growing demand for multivoice synthesis in the mid-1970s music scene, where existing polyphonics were either expensive custom builds or lacked programmable memory, forcing musicians to painstakingly recreate sounds session after session. Smith, who had left his day job in aerospace engineering that spring to focus on Sequential full-time, drew from prior projects including a programmer and an early digital sequencer to integrate digital control with analog sound generation. Early development centered on prototypes that highlighted the challenges of achieving stable . The initial evolved from Sequential's Model 1000 into what became known as the Prophet-10, a 10-voice version that proved unstable due to excessive heat generation and reliability issues in its voltage-controlled circuits. This led to scaling down to five voices for the production model, striking a balance between musical utility and engineering feasibility while maintaining the core goal of polyphonic performance. Key engineering hurdles included sourcing and integrating Solid State Microelectronics (SSM) chips for the voltage-controlled oscillators (VCOs) and filters, which provided the analog warmth essential to the but required precise to ensure consistent tuning across voices. A major innovation was the development of the synthesizer's patch memory system, powered by a Z80A that allowed users to store and recall up to 40 presets digitally—a breakthrough that eliminated the need for analog voltage storage methods prone to drift. This digital oversight of analog components marked a pioneering hybrid approach, enabling reliable without fully abandoning the organic tone of analog synthesis. The Prophet-5 debuted at the Winter in January 1978, where it garnered immediate attention as the first to combine programmable memory with true polyphonic capabilities, setting a new standard for the industry.

Production

The production of the original Prophet-5 began in and continued until , marking a pivotal era for analog polyphonic synthesizers at Sequential Circuits. Initial units were hand-built, reflecting the company's early artisanal approach before scaling to meet demand. Over the run, three main revisions were produced, each introducing refinements in build quality, reliability, and features, while transitioning from custom components to more standardized integrated circuits. Approximately 7,500 Prophet-5 units were manufactured in total across all revisions. The Revision 1 (Rev 1), released in , consisted of 182 hand-built units housed in a koa-wood case with wooden side panels. These early models lacked patch storage capabilities like cassette backup and relied on a proprietary digital interface as a precursor to later standards, but they were prone to instability due to their fragile construction. Production was limited, with many units requiring frequent maintenance, and few surviving in original condition today. Revision 2 (Rev 2), produced from late to , saw over 1,000 units manufactured across three sub-revisions (2.0, 2.1, and 2.2), featuring a more robust case and improved polyphonic keyboard scanning for greater stability. A key addition was cassette backup for storing up to 40 patches, addressing a major limitation of the Rev 1 and enhancing usability for musicians. These changes made the Rev 2 far more reliable than its predecessor while retaining the SSM chips for the synthesis engine. Revision 3 (Rev 3), the most prolific variant from 1980 to 1984, accounted for nearly 6,000 units and shifted to a steel chassis for durability, accented with walnut trim. It incorporated Electro-Music Specialties (CEM) chips, including the CEM 3320 for filters and others for voltage-controlled oscillators (VCOs), improving consistency and reducing the temperamental nature of earlier SSM-based designs. Memory expanded to 120 patches in later sub-revisions (3.3), and enhanced implementation was added in 1983, allowing integration with emerging digital setups. These updates solidified the Rev 3 as the definitive production model. In 1981, Sequential introduced the Prophet-10 as a 10-voice expansion of the Prophet-5 design, using dual keyboards and paired sound boards for doubled . Limited to around 300 units due to persistent and tuning stability issues, it included advanced features like a micro-cassette drive for storage and modes with 20 oscillators, but its complexity curtailed widespread adoption. Original Prophet-5 and Prophet-10 production ended in 1984, as Sequential Circuits grappled with financial difficulties and the industry pivoted toward digital instruments, diminishing demand for analog polyphonics.

Design

Synthesis engine

The Prophet-5 employs a subtractive analog synthesis engine, utilizing voltage-controlled components to generate and shape sounds through the removal of harmonics from rich oscillator waveforms. Each of its five voices operates independently with dedicated analog circuitry, enabling true polyphonic performance without shared signal paths that could introduce artifacts. This per-voice design, pioneered in the late , contributed to the instrument's reputation for warm, organic tones by allowing simultaneous note articulation with minimal crosstalk. At the core of each voice are two voltage-controlled oscillators (VCOs), providing the primary sound sources. In early revisions (Rev 1 and 2), these were based on SSM 2030 chips, while Rev 3 transitioned to CEM 3340 VCOs for improved stability; the reissued models faithfully replicate the CEM 3340 design. Each VCO offers selectable sawtooth, , and variable-width waveforms (functioning as square at 50% ), with Oscillator B tunable over a wide range including low-frequency modes for sub-oscillator effects. These oscillators can be detuned or mixed in varying ratios to create thick, layered timbres characteristic of the Prophet-5's versatile palette. Sound shaping occurs via a 4-pole low-pass resonant filter per voice, initially implemented with the SSM 2040 chip in Rev 1 and 2 for its distinctive soft distortion, and replaced by the CEM 3320 in Rev 3 for a brighter response— a change briefly referenced here but detailed in production histories. The filter features continuously variable and , enabling classic sweeps from mellow to aggressive. Two ADSR envelope generators modulate amplitude (via a voltage-controlled , VCA) and filter cutoff, with adjustable attack, decay, sustain, and release times to contour both volume and tonal evolution dynamically. The instrument supports 5-voice , assigning voices to played notes on a lowest-note priority basis in polyphonic mode, which ensures consistent layering for chords while prioritizing bass notes in complex passages. In mode, all voices stack on the lowest note for monophonic fatness, but the standard poly configuration maintains independent voicing. The signal flow follows a classic subtractive path: the two VCOs and a generator mix before feeding the VCF, whose output then passes to the VCA for final control. No built-in effects such as reverb or delay are present, emphasizing raw analog purity that relies on external for spatial enhancement. This straightforward allows precise control over evolution, from bright leads to lush pads. Modulation enhances the engine's expressivity, with a global low-frequency oscillator (LFO) providing triangle, sawtooth, square, and random waveforms to modulate , filter cutoff, or pitch across all voices simultaneously. The poly-mod section introduces per-voice routing, where Oscillator B can cross-modulate Oscillator A's pitch (up to full audio-rate for metallic tones) or the filter, alongside hard sync (Osc A slaving to B's frequency) for aggressive, harmonically rich leads. These features, combined with the analog components' inherent warmth and slight instabilities, yield the Prophet-5's signature thick, evolving analog tone prized in genres from to film scoring.

Controls and memory

The Prophet-5's utilized a 40-slider interface for real-time parameter adjustment, enabling musicians to modify oscillator mix levels, filter and , and generator stages (attack, decay, sustain, and ) across all five voices simultaneously. These sliders were grouped into logical sections—oscillators, mixer, filter, amplifiers, and low-frequency oscillator (LFO)—providing a knob-per-function equivalent in slider form that prioritized hands-on accessibility for live and studio environments. The instrument's 61-note, five- keyboard supported polyphonic for smooth gliding transitions between notes and included transpose switches for extended range, though early revisions (Rev 1 and Rev 2) lacked velocity sensitivity and aftertouch, features that appeared in select later variants and reissues. Central to the Prophet-5's usability was its pioneering memory system, which employed a to scan and digitally store analog control settings, marking the first capable of precise, non-volatile recall of up to 40 programmable patches. In Revision 2 and subsequent models, this system supported cassette dumps for and expansion, allowing users to store and load 120 patches (three banks of 40) externally via audio interface, while Revision 3.3 increased onboard capacity to 120 patches through hardware modifications. Additional performance controls encompassed a master tune knob for global pitch calibration, a spring-loaded pitch bend with adjustable range, a modulation for real-time LFO or other effects, and a input for playing, but the design omitted a built-in sequencer to emphasize synthesis and patching over sequencing. Patch management streamlined workflow through , where users selected programs via a two-digit display (e.g., banks 1-5 and programs 1-8 within each), and an edit/compare function that toggled between the modified patch and its saved original, preserving integrity during without overwriting data until explicitly recorded.

Impact

Musical applications

The Prophet-5 quickly found favor among early adopters in the late 1970s and early 1980s, revolutionizing polyphonic synthesis in live and studio settings. , one of the instrument's first prominent users, featured it prominently on their 1978 track "1000 Knives," where its programmable voices enabled complex, layered arrangements that blended electronic and pop elements. The Cars' keyboardist integrated the Prophet-5 into their 1981 album Shake It Up, contributing to the band's signature new wave sound with its versatile poly-modulation capabilities. Similarly, Kraftwerk employed the for polyphonic layers during their 1981 Computer World tour, enhancing their minimalist electronic compositions with richer harmonic textures. Iconic recordings further showcased the Prophet-5's sonic versatility across genres. On Michael Jackson's 1982 album Thriller, programmer crafted the eerie synth opening for the title track using the Prophet-5, layering its oscillators to produce haunting, atmospheric pads that underscored the song's horror-themed narrative. In film scores, composer Alan Howarth utilized the instrument alongside for the Halloween series (including Halloween II and Halloween III: Season of the Witch in 1981–1982), where its warm analog filters created tension-building leads and ambient drones, defining the era's synth-horror aesthetic. Daryl and also harnessed it for the funky bass and chord stabs in their 1981 hit "I Can't Go for That (No Can Do)," demonstrating its punchy low-end response in and pop contexts. The Prophet-5 exerted significant influence in new wave and , genres where its five-voice polyphony allowed for lush, ensemble-like performances previously limited by monophonic synths. incorporated it on his 1980 album , notably on "The Aircrash Bureau," to craft icy, futuristic pads that amplified his pioneering electro style. (OMD) relied on it for melodic lines and textures in their 1984 album , helping define the genre's emotive, hook-driven sound. Its adoption extended to film scoring, with composers like Howarth favoring it for organic warmth in 1980s thrillers such as Christine (1983) and (1981). In studio techniques, producers exploited the Prophet-5's analog circuitry for its inherent warmth and instability, often layering multiple voices to simulate chorusing and detuning effects that added depth without digital processing. Filter sweeps on its resonant produced sweeping leads ideal for builds and transitions, as heard in ' 1981 track "," where enhanced the drama. This organic character made it preferable to emerging digital synths for authentic, expressive tones. Vintage units continue to be prized in modern productions, particularly during the indie electronic revival, where artists like employed restored models for their irreplaceable harmonic richness on albums such as Kid A (2000, with ongoing use in live settings).

Industry influence

The Prophet-5 pioneered true polyphonic synthesis with five voices and full programmability through microprocessor control, establishing a benchmark that influenced competitors such as the Oberheim OB-X and, to a lesser extent, the earlier but less programmable Yamaha CS-80. By integrating patch memory for instant recall of all parameters, it shifted the industry from manual, non-repeatable setups to reliable, user-friendly designs, making polyphony accessible beyond experimental modular systems. This innovation not only democratized complex sound design but also pressured manufacturers to adopt similar features, accelerating the transition to integrated polysynths as standard studio tools. The synthesizer's market dominance was evident in its sales of nearly 6,000 units between 1978 and 1984, positioning Sequential Circuits as a leading force and outpacing rivals in the analog polyphonic segment. This commercial success validated synthesizers as viable production instruments, contributing to the economic expansion of the electronic music sector in the 1980s by increasing demand for professional-grade gear and fostering a boom in studio integrations. Sequential's emphasis on scalable techniques further enabled cost-effective production, reducing reliance on bespoke modular rigs and broadening market accessibility. Sequential's early embrace of digital control in the Prophet-5 laid groundwork for interoperability standards, with the instrument's Revision 3 using the proprietary DCB interface as a MIDI precursor; MIDI was first implemented by Sequential in the Prophet-600 in 1983 shortly after the protocol's adoption, facilitating seamless device communication. Founder Dave Smith's advocacy for MIDI, building on the Prophet-5's programmable architecture, directly influenced the protocol's development and widespread implementation, enabling the ecosystem of interconnected electronic instruments that defined subsequent decades. The Prophet-5's warm analog timbre also left a lasting design legacy, inspiring emulations and hybrid synths that sought to replicate its "fat" sound in the digital age while proving analog polysynths could be produced at scale, ultimately contributing to the genre's maturation beyond niche applications.

Successors and emulations

Official models

The Prophet-10, released in 1981 by Sequential Circuits, served as the official 10-voice expansion of the original Prophet-5 design, utilizing a dual-chassis configuration that combined two five-voice units with shared controls for enhanced polyphony. This model featured twin oscillators per voice, dedicated LFO, pulse-width modulation, cross-modulation, oscillator sync, and ADSR envelopes, allowing modes from full 10-voice polyphony to a 20-oscillator monophonic setup. However, it was plagued by significant reliability issues, including major overheating from heat build-up within the case and unstable tuning that limited stable operation to mere minutes, rendering it clumsy for practical use. Approximately 300 units of the initial Revision 0 were produced, all based on CEM chips rather than the SSM variants used in early Prophet-5 prototypes, contributing to a cleaner but less gritty sound profile. Sequential's later Prophet series evolved the lineage with digital enhancements, beginning with the Prophet-600 in 1982, a six-voice polyphonic analog synthesizer that introduced microprocessor-based digital control for memory and sequencing to reduce costs compared to the Prophet-5. This model retained core analog components like dual VCOs per voice (sawtooth, triangle, and pulse waveforms), a resonant 24 dB/octave low-pass filter, and poly-modulation, while adding an onboard arpeggiator, two-track sequencer, and marking the first commercial implementation of MIDI for external control. The digital control layer enabled programmable patches and easier integration into MIDI setups, bridging analog sound generation with emerging digital interfacing standards. This progression culminated in the Prophet VS of 1986, Sequential's final major release before the company's initial closure, an eight-voice hybrid synthesizer that pioneered vector synthesis for dynamic sound morphing across four oscillators per voice drawn from a 127- bank. Vector synthesis allowed real-time blending of via a or programmable vectors, combined with analog filters and VCAs for hybrid digital generation and analog processing, enabling complex timbral shifts and arpeggiations not possible in prior models. The design emphasized waveform-level synthesis power, with velocity-sensitive keyboard and full implementation, influencing subsequent vector-based instruments. In 2020, Sequential reissued the Prophet-5 as the Rev 4 edition, a faithful analog recreation using original CEM 3340 VCOs and selectable filter chips—Rev 1/2 with Dave Rossum-designed 2140 or Rev 3 with CEM 3320—to authentically replicate the warm, compressed tones of the 1978-1984 originals across five-voice ($3,499) and ten-voice ($4,299) configurations. Key enhancements for modern compatibility include USB for bidirectional communication, full 2.0 support (the first to implement it), and channel aftertouch sensitivity on the semi-weighted Fatar keyboard, and an display for program information and menus. Additional features comprise vintage and digital modes to emulate original filter responses or provide linear modern alternatives, a polyphonic step sequencer and arpeggiator, balanced stereo outputs, and a stable linear to mitigate the original's tuning and heat instability without altering the core analog signal path. Bi-timbral operation and unison modes with configurable voice stacking further expand versatility while preserving the knob-per-function panel. In October 2024, Sequential released the Prophet-10 Special Edition, a limited-run (150 units) version of the 2020 reissue featuring distinctive South American lacewood panels unique to each instrument, a , and an embroidered protective cover to commemorate the 50th anniversary of the company. The Prophet-6, introduced in 2015 under Dave Smith Instruments (later rebranded Sequential), acts as a six-voice hybrid analog successor that blends the Prophet-5's iconic tones with updated architecture, featuring discrete VCOs per voice and dual filters—a four-pole resonant low-pass inspired by the Prophet-5 Rev 2 SSM design alongside a two-pole high-pass for broader tonal flexibility. This model maintains an all-analog signal path for oscillators, filters, and envelopes but incorporates digital control for effects (24-bit/48 kHz reverb, delay, chorus) and a polyphonic sequencer, expandable to 12 voices via chaining. The semi-weighted keyboard with and aftertouch, along with poly-mod and capabilities, positions it as a spiritual evolution, emphasizing the Prophet-5's legacy while adding high-pass filtering and for contemporary applications.

Third-party recreations

Third-party recreations of the Prophet-5 have emerged since the mid-2000s, encompassing software plugins that model its analog synthesis engine and hardware clones that replicate its circuitry using modern components. These efforts aim to capture the instrument's signature warm, polyphonic sound while addressing accessibility and cost barriers associated with vintage or official hardware. Arturia released Prophet V in 2006, a software emulation combining the Prophet-5 with the Prophet-VS vector synthesizer, utilizing True Analog Emulation (TAE) technology to model the original's voltage-controlled oscillators (VCOs) and filters (VCFs) for authentic timbre and behavior. In 2023, Softube introduced Model 80, a VST plugin that employs component-level modeling to replicate the exact responses of the Prophet-5 Rev 3's CEM chips, including oscillator drift and filter non-linearities, enabling precise recreation of the hardware's dynamic interactions. Similarly, u-he's Repro-5, launched in the 2010s, offers a hybrid emulation centered on the Prophet-5's core architecture with influences from the Oberheim OB-X, incorporating DSP techniques to simulate analog instabilities like thermal noise and component aging for evolving, organic tones. On the hardware side, the Profree-4, developed by Japan's PikoPiko Factory and launched via in 2022, is an open-source DIY kit that recreates the Prophet-5 Rev 3's four-voice using contemporary surface-mount components and battery-powered operation, allowing users to build a compact, portable analog clone from public schematics. unveiled a of the Pro-16 at NAMM 2025, a 16-voice polyphonic hardware clone expanding on the Prophet-5 and Prophet-10 designs with multi-mode filters and multi-timbrality, though as of October 2025, development appears to have been cancelled, with preorders discontinued. These recreations leverage advanced DSP for emulating analog drift and non-linearities, such as subtle pitch variations and distortions inherent to the original's Electromusic Specialties (CEM) and Solid State Microelectronics (SSM) ICs, without requiring rare vintage parts. By offering lower-cost alternatives—such as plugins priced under $200—they have democratized access to the Prophet-5's lush, evolving sounds for contemporary producers and hobbyists. No direct legal infringement claims have arisen from these projects, which draw inspiration from publicly available schematics rather than proprietary designs.

References

  1. https://sequential.com/classics-reissued/prophet-5-10/
  2. https://reverb.com/news/the-path-of-the-prophet-how-dave-smiths-invention-changed-the-synth-game
  3. https://sequential.com/product/prophet-5/
  4. https://www.gordonreid.co.uk/vintage/prophet.shtml
  5. https://www.mixonline.com/technology/1978-sequential-circuits-prophet-5-first-programmable-polyphonic-synth-383725
  6. https://greatsynthesizers.com/en/general/prophet-5-revision-1-impressions-of-the-prophet/
  7. https://equipboard.com/items/sequential-circuits-prophet-5-rev-3
  8. https://www.soundonsound.com/reviews/sequential-prophet-5-prophet-10
  9. https://rosensound.com/pages/cem-ssm-chips-in-synthesizers
  10. https://synthfool.com/docs/SequentialCircuits/Prophet_Series/Sequential%20Circuits%20Prophet%205%20Owners%20Manual.pdf
  11. https://www.vintagesynth.com/sequential-circuits/prophet-5
  12. https://www.perfectcircuit.com/signal/sequential-prophet-5-2020
  13. http://analogsynthmuseum.free.fr/PROPHET5CHIPS
  14. https://sequential.com/wp-content/uploads/2020/10/Original-Prophet-5-Patch-Sheets-1.1.pdf
  15. https://insheepsclothinghifi.com/5-songs-featuring-prophet-5/
  16. http://kraftwerkfaq.hu/equipment.html
  17. https://www.youtube.com/watch?v=Y4jHC3ktbUk
  18. https://microchop.substack.com/p/samplers-synths-and-the-halloween
  19. https://synthtrax.net/index.php/Sequential_Circuits_Prophet_5_Song_List
  20. https://www.discogs.com/release/414872-Orchestral-Manoeuvres-In-The-Dark-Junk-Culture
  21. https://www.fotwaudio.com/radio-documentaries/the-sinister-low-note-of-john-carpenter-and-alan-howarth/
  22. https://www.musicradar.com/news/5-tracks-producers-need-to-hear-featuring-the-prophet-5-synth
  23. https://www.musicradar.com/music-tech/synths/from-the-prophet-5-to-the-fourm-the-story-of-sequential-in-10-synths-sequencers-and-drum-machines
  24. https://greatsynthesizers.com/en/review/sequential-prophet-5-milestone-and-musical-legend/
  25. https://www.voxstudios.com/news/dave-smith-and-the-evolution-of-synthesizers-the-story-of-the-prophet-synthesizer-and-sequential-circuits
  26. https://midi.org/dave-smith-and-sequential-circuits
  27. https://www.soundonsound.com/people/farewell-father-midi-prophet-polysynths
  28. https://www.vintagesynth.com/sequential-circuits/prophet-600
  29. https://www.musicradar.com/news/vintage-music-tech-icons-Sequential-Circuits-Prophet-600
  30. https://www.vintagesynth.com/sequential-circuits/prophet-vs
  31. https://www.perfectcircuit.com/signal/prophet-vs-history
  32. https://www.perfectcircuit.com/sequential-prophet-5-rev4.html
  33. https://www.soundonsound.com/news/sequential-unveil-prophet-10-special-edition
  34. https://sequential.com/modern-analog/prophet-6/
  35. https://www.soundonsound.com/reviews/dave-smith-instruments-sequential-prophet-6
  36. https://www.soundonsound.com/reviews/arturia-prophet-v
  37. https://www.softube.com/plug-ins/model-80-five-voice-synthesizer
  38. https://u-he.com/products/repro/
  39. https://synthanatomy.com/2025/01/behringer-previews-pro-16-feature-set-16-analog-voices-multi-timbrality.html
  40. https://www.synthtopia.com/content/2025/10/21/behringer-vcs3-pro-16-cancelled/
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