Sequential Pro 3

Last modified on June 19th, 2022 at 5:57 pm

Clearly the Sequential Pro 3 is the #1 monophonic paraphonic synth on the market today

Sequential Pro 3 $1999.00 Standard Edition – $2199.00 Special Edition

I can’t speak for the market, but an informed synthesist knows there is nothing quite like a Sequential Pro 2; it clobbers every other keyboard class monophonic/paraphonic synth made. A Pro 3 would have to be an amazing machine to take its place. It is a very high bar to reach that has been set by the Pro 2. The Pro 3 reaches that bar.

First of all, both Pro 3 models look great, especially the SE with its ala Moog hinge, traditional woods and printed panel design that matches the Sequential Prophet X. The Pro 3 includes both analog and digital wavetable oscillators. The sequencer is killer. The 4 knob/4 button screen interface is a familiar joy.

I’m sure the high end paraphonic synthesizer market is a tough place to play, but after the initial sparkles wore off, I saw a few major changes in the Pro 3 compared to the Pro 2. It is very important to approach the Pro 3 as a whole new synth. It is not a souped up Pro 2.

The Pro 3 has 37 keys exactly like the Moog Subsequent 37. This is the critical competitor comparison here in my opinion. Sequential/Dave Smith Instruments synths have always been Moog killers. In fact, when I decided to buy the Pro 3, it was mainly to replace my Subsequent 37. I loved the Moog, but I’m an even bigger fan of the Sequential screen/knob workflow (and let’s face it, the Subsequent 37’s screen capabilities at best are extremely dated), and now with Pro 3’s analog and digital wavetable oscillators, the Moog would have been even further isolated in my gear, so I sold it.

My Pro 3 use is generally lead, bass, percussion, heavily sequenced or modulated sounds. It is not my go to poly. I have 2 flagship polyphonics; I am not looking for the Pro 3 to do chords or pads, though it can do that very well. Paraphonic is the most I need and most of the time mono. Dave Smith did his homework here, the market yearned for analog and wavetable oscillators and the price is still in a range it doesn’t have to compete with high-end polys.

With all 3 oscillators, the Pro 3 has 3 paraphonic voices instead of the Moog Subsequent 37’s 2 paraphonic voices. To be clear though, you can only do 2 of those voices with the exact same oscillators (analog). I think many people will really like the Pro 3’s analog oscillators. They sound amazing. You can stick to the classic wave shapes (triangle, saw and pulse, all with wave shaping) common to all 3 oscillators (analog and digital) to get fairly similar paraphonic voices. A 2 oscillator duo mode is also in firmware 1.1 and newer.

Some might consider 3 voices with 2 distinct types of oscillators to be somewhat unusual, however I think the unusual would be very desirable and exactly what you want. Mixing it up even further with all 3 oscillators set to different waveforms, shaping and modulation is the peak use of the paraphonic mode in my opinion.

The 3rd digital oscillator is quite interesting, with 64 digital wavetable slots with 16 waves in each slot with wave morphing; can function as an LFO for complex wavetable-based modulation. Wavetable slots 1-32 are factory supplied wavetables. Wavetable slots 33-64 are for user supplied wavetables as of the 1.1 firmware update. There is also a Sequential wavetable generator site to make an unlimited selection of wavetables for those user supplied slots.

Obviously, the Pro 3 is no Waldorf Quantum, but I’m 100% certain that is not Sequential’s intention nor are the price points remotely comparable.

There are 3 filters on the Pro 3. You can use them one at a time. There is no serial, parallel, or split oscillator routing. Dave Smith says it would get messy routing 3 filters, and most of the time routing a low-pass through a low pass wouldn’t make sense. Personally, I would have liked to have split oscillator routing through two different filters, but this is minor.

There is 1 latchable position-sensitive touch slider, without pressure-sensitivity. There are 3 LFOs, and to be exact, the wavetable oscillator can be your 4th LFO, and its abilities are a real upgrade to the LFO palette.

The Pro 3 improves on the Pro 2 capabilities to function as your control center synth. In addition to MIDI in, MIDI out 1, MIDI thru and MIDI out 2, it has 4 CV inputs, 4 CV outputs and a gate output. The 16 track 64 step sequencer outputs to CV and all other modulation destinations. All the extensive modulation sources output to CV as well.

The Pro 3 is a real contender, I expect it to outsell the Pro 2. The Pro 3 is definitely a Moog Subsequent killer. You will find many people that have owned both, and almost every one of them prefer the Pro 3 over the Moog. A small minority still hold on to the legend of Moog bass, and perhaps it’s subjective but I think they are meshuganah. The Pro 3’s bass will peel the posters off your walls, if you let it.

In actual use, the Pro 3 pairs well with a Prophet X or Quantum, just like the Pro 2 already does.

If you are fortunate enough to have a Sequential Pro 2, keep it! The Pro 3 not only reaches the bar the Pro 2 sets, but complements it in amazing ways.

“Combining a Sequential Pro 2 and Pro 3 creates a monster synth system… 7 oscillators, 5 filters, 7 envelopes, 32 lanes of note, parameter and CV sequencing, 8 assignable CV Ins, 8 assignable CV Outs, and I’m not even going to try to count the modulation possibilities.” -Chris Stack

I know I’m not the only one that thinks the Pro 3 really whets the appetite for a Sequential Pro Poly8. One can only hope. Sequential Pro 2/3 features are like nothing else.


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Sequential Pro 3 related posts
Jun 19, 2020 – Sequential Pro 3 joins studio

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Product Description

A Three-Generation Legacy

The Sequential Pro 1 and Pro 2 mono synths achieved nearly legendary status in their time. So it was only natural that we build on their strengths with an even more worthy successor. Enter the Pro 3, Sequential’s 2-VCO + wavetable mono/paraphonic synth – a new benchmark for raw sonic power and unrivalled versatility.

The Power of 3

The Pro 3 boasts three oscillators, three vintage filters, three LFOs, four loopable envelopes, a massive 32-slot mod matrix, and an 16 x 16 x 4 sequencer. Throw in dual digital effects and four control voltage ins and outs, and you’ve got a hugely powerful instrument that’s as exciting to program as it is to play.

A Next-Generation Classic

The Pro 3 is a hybrid of solid, old-school analog synthesis paired with versatile digital technology. Its two voltage controlled oscillators provide warmth and presence while its third wavetable oscillator provides digital edge and grit. With 64 tables of 16 waves each and wave morphing, tonal possibilities are immense. Tuned feedback with grunge, and analog distortion deliver industrial-grade nastiness on demand.

Three Filters Based on Vintage Designs

At the heart of the Pro 3’s ballsy sound are its vintage-style filters. Filter 1 is a 4-pole lowpass design based on the Prophet-6 filter. Filter 2 is a classic transistor ladder filter with optional resonance compensation to preserve its low-end punch. Filter 3 is a classic 2-pole, state-variable design based on the OB-6 filter that can be continuously varied between lowpass, notch, and high-pass operation, with an optional band-pass mode. An additional Drive control provides still more punch when you really want to get down and dirty.

Expressive Sequencing

Possibly the Pro 3’s most powerful performance tool is its sequencer. With 16 tracks, 16 steps, and 4 phrases, it features both real-time and step input, ratcheting, variable gate and sequence lengths, multiple playback modes, and paraphonic operation. It also syncs to MIDI clock and external audio input, and inputs/outputs control voltages. In addition to notes, sequence tracks can control any parameter in the 132-destination modulation matrix.

Plays Well with Modulars

The Pro 3’s flexible architecture opens the door to not only processing external audio, but also to interfacing with modular synths through its 4 rear-panel control voltage inputs/outputs and a dedicated gate output. Control voltages can be assigned and routed from within the modulation matrix and can run at audio rates for extreme modulation effects. Some of the many parameters that can be sent to the CV outputs include oscillators, LFOs, envelopes, and sequencer tracks, allowing the Pro 3 to become the central hub of a modular or multisynth setup.

Effects, Envelopes, LFOs, an Arpeggiator, and Extreme Modulation

The Pro 3’s Effects section provides delays, reverbs, time-domain effects such as chorus/phasing/flanging and more. There are four loopable five-stage envelope generators, three syncable LFOs with slew and phase offset, a full-featured arpeggiator, and a 32-slot modulation matrix with dozens of modulation sources and over a hundred destinations.

Monophonic and Paraphonic Operation

The Pro 3 was designed to be a super-powerful monosynth, but it is also a versatile 3-voice paraphonic synth. This makes playing 3-note chords not only possible, but with creative use of effects and some per-oscillator modulation, mind-blowingly expressive.
Put all of this sonic power in a three-octave, semi-weighted keyboard with velocity and channel aftertouch, add backlit pitch and mod wheels and a location-sensitive touch slider, and you’ve got one of the most inspiring synths ever made.


  • Two analog, voltage-controlled oscillators
  • One DSP-based digital oscillator
  • Analog oscillators produce three classic wave shapes: (triangle, saw, pulse) with variable shape modulation/pulse width on each
  • Digital oscillator produce 64 digital wavetables of 16 waves each with wave morphing, plus classic wave shapes (sine, triangle, saw, variable-width pulse) and super saw
  • Digital oscillator 3 can function as an LFO for complex wavetable-based modulation
  • White noise generator
  • Hard sync, per-oscillator Glide, Oscillator Slop
  • 3-voice paraphonic mode with individually-gated envelopes per oscillator
  • Three classic filter types
  • Filter 1 is a 4-pole, 24 dB per-octave, Prophet-6™ low-pass filter
  • Filter 2 is a classic, 4-pole, 24 dB per-octave, transistor ladder filter with optional resonance compensation
  • Filter 3 is a 2-pole, 12 db per-octave, OB-6™ state-variable filter. It can be continuously varied between low-pass, notch, and high-pass operation, with an optional band-pass mode.
  • Three syncable LFOs with phase offset and slew per LFO
  • Five waveshapes: triangle, saw, reverse saw, square, and S&H
  • Four ADSR envelopes with delay (Filter, VCA, and two Auxiliary envelopes)
  • Envelopes freely assignable to multiple modulation destinations
  • All envelopes can repeat/loop
  • Dual digital effects
  • Stereo delay, BBD delay, chorus, flanger, phaser, ring mod, vintage rotating speaker, distortion, high-pass filter, super plate reverb
  • Tuned feedback with Grunge for extra-aggressive tonal destruction
  • Programmable analog distortion
  • 32 slot modulation matrix with over 46 mod sources and over 171 mod destinations
  • Modulation assignment buttons enable quick and easy modulation routing
  • Mod Matrix runs at audio rates
  • Four control voltage (CV) inputs and outputs for interfacing with modular synths and other CV-compatible devices
  • Parameters that can be sent to CV outputs include oscillators, LFOs, envelopes, sequencer tracks and any other source within the modulation matrix. Runs at audio rates.
  • Gate Out for triggering external CV-compatible devices. Any CV in can be used as a gate input.
  • Advanced sequencer with three modes: normal, gated, and trigger
  • 16 tracks and 4 linkable 16-step phrases
  • Per-step ratcheting, duration, and velocity
  • Multiple playback modes: forward, reverse, forward/reverse, random
  • Supports real-time/step input, rests, and variable-length sequences
  • Syncs to MIDI clock and external audio and CV input
  • Sequences freely assignable to any modulation destination
  • Sophisticated arpeggiator with up, down, up+down, random, assign modes
  • Syncs to MIDI clock and external audio and CV inputs
  • Re-latching arpeggiation
  • Runs concurrent with Sequencer for arpeggiated patterns with parameter automation
  • Over 60 knobs and 70 buttons enable deep, comprehensive editing with minimal menu diving
  • Backlit pitch and mod wheels are easily visible in low-light situations and have a smooth, precise response.
  • Independently adjustable upper and lower pitch wheel range
  • Position-sensitive latchable touch slider for enhanced interactivity and control
  • Full-sized, three-octave, semi-weighted keyboard with velocity and aftertouch
  • 512 user and 512 factory programs
  • Playlist mode for generating easily accessible set lists of your favorite programs
  • 1 MIDI In, 1 MIDI Out, and 1 MIDI Thru/Out 2 port
  • USB port for bidirectional MIDI communication
  • 4 CV inputs (4 x 1/8″ jack) with -10v to +10v voltage range
  • 4 CV outputs (4 x 1/8″ jack) with -10v to +10v voltage range
  • 1 Gate Out  (1/8″ jack)
  • 1 Sustain/footswitch input
  • 1 Expression pedal input
  • 1 External audio input  (1/4″ phone jack)
  • Main stereo output (2 x 1/4″ phone jack)
  • Headphone out (stereo 1/4″ phone jack)
  • 1 universal IEC AC power inlet for internal power supply
  • Operates worldwide on voltages between 100-240v, 50-60Hz, 30 watts maximum power consumption
  • Premium, 3-octave, semi-weighted Fatar keyboard
  • 26.5″ L x 13″ W x 3.5″ H (67.3 cm x 33 cm x 8.9 cm)
  • Weight: 16 lbs (7.25 kg)