BLUE-III

Name: BLUE-III
Price: 130.68 USD
Author: Rob Papen

by Rob Papen · Synth · Cross-fusion FM and subtractive synth

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BLUE-III is Rob Papen's cross-fusion synth, combining subtractive and FM synthesis with Karplus-Strong string modeling and built-in samples.

It loads up to six user samples per preset, has an XY pad and over 5,000 presets, and costs $149.

Best for: Keys & Synths, Bass, Sound Design. Genres: Electronic & EDM, Pop, Ambient & Cinematic.

Keywords: FM, subtractive, lush, preset-driven, drag-and-drop routing, modulation matrix, pads, plucks, sequencer, modern, retro, advanced, analog-sounding, arpeggiator, cinematic, electric piano, leads, monophonic, skeuomorphic, sound design, surgical, granular, warm.

What it does

BLUE-III is the third version of Rob Papen's "cross-fusion" synth, which mixes FM and subtractive synthesis in one engine. Version 3 adds string modelling and user samples, and borrows audio-engine work from Rob Papen's BIT synth.

Oscillators: six oscillators with analog-modelled waveforms, spectrum waveforms, Karplus-Strong string models and samples, with granular playback on some samples.
FM: algorithm control sets how the six oscillators modulate each other, so you can move from pure FM to filtered subtractive sounds.
Samples: built-in samples, and up to six of your own samples loaded into each preset.
Filters: two filters in serial or parallel, with low-pass and high-pass slopes from 6 to 36 dB, band-pass, notch, comb, vocal and formant types; new filter types were added in version 3.
Modulation: four multi-envelopes with up to 15 sections and loop options, many LFOs, and a modulation matrix with an advanced mode.
Sequencing: a 32-step arpeggiator with ratcheting, and a 32-step monophonic sequencer that can change waveform per step.
XY pad and effects: the XY pad now sits on the front panel and can record movements in sync with tempo; four effect slots offer 34 effect types with flexible routing.

It ships with over 5,000 presets and a redesigned GUI in several sizes. A demo is available.

Source: Rob Papen product page

When to use it

BLUE-III is the better pick when you want FM bells, keys and plucks that can also be filtered like a subtractive synth, backed by a very large preset library. Compared with Omnisphere 3, it has far less sampled content but is lighter and cheaper. Pigments 7 and Phase Plant offer more modern drag-and-drop modulation, while BLUE-III keeps a fixed six-oscillator FM layout with algorithm control that suits classic FM sounds. Next to Rob Papen's own BLADE-2, it is more of an all-rounder, adding string models and user samples to the FM core. Forum users describe a range from D-50-style retro tones to modern sounds.

Best for: FM bells, electric pianos, plucks, lush pads and leads, mostly from presets.
Genres: electronic, pop, cinematic and retro 80s-style music.
Look elsewhere if: you need deep sampled instruments (Omnisphere 3) or a visual modulation workflow (Pigments 7); for solid sub-bass a simpler analog-style synth like Diva may suit better.

What producers say

Users praise BLUE's character, presets and developer support; the few complaints concern early VST3 and MPE issues in version 3.

VI-Control thread users liked that it sounds "modern and progressive but can be retro", the third-party preset banks, and a "very responsive" developer.
KVR users rate the BLUE line 5 out of 5 from 3 reviews (covering earlier versions), praising lush pads, warm basses and a clear interface; one found it "not the best synth for subbasses".
Criticisms: VI-Control users reported VST3 wrapper problems at launch, and MPE mode that could not be set globally or follow host automation yet.

Where to buy

Tutorials and reviews

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