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Aurora FM

FM Synthesizer Plugin by Audio Nebula
$17 CAD - Introductory pricing
Aurora FM
Aurora FM by Audio Nebula is a Virtual Instrument Audio Plugin for Windows and Linux. It functions as a VST Plugin.
System Requirements
Reported to work on Linux w/Wine 4.0.
Copy Protection
Key File
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KVR Rank

Overall: 1500   1468   115

30-Day: 2079; 7-Day: 2974; Yesterday: 3941

Aurora FM: Modern 6-operator pure FM synthesizer with advanced modulation.


  • 6-operator, 32-algorithm advanced FM synthesizer with 8 sine-based waveforms, 30 voices, deep modulation, effects (overdrive, chorus, delay, and reverb), and performance features.
  • Single-screen, everything-visible, non-skeuomorphic UI with controls designed for efficient mouse interaction and visual feedback; no hidden parameters, tabs, menu-diving, etc.
  • DPI-aware and custom scaling from 50-150%.
  • Much more than a mere DX7 emulation - Aurora FM translates Yamaha DX7/21/27/100/11 and TX81Z patches but is a superior, semi-modular, flexible, highly-usable modern instrument for musicians and synthesists.
  • 100% original SSE-optimized C++ code (no SynthEdit, no VSTGUI, no 3rd party libraries), high-resolution sine generators, and full-rate sample-accurate modulation combine for a great sound.
  • Inspired by modulation monsters like the Alesis Ion and Waldorf Q.



  • High-resolution sine generators provide the 8 sine and sine-transorm waveforms found in the TX81Z and DX11.
  • 3 frequency selection modes - Ratio, Fixed, and the unique Relative mode which facilitates setting intervals.
  • Variable waveform sync phase (0°, 90°, 180°, 270°, and none).
  • On/Off toggling with clear visual feedback.
  • Variable 2x3 or 3x2 algorithm-dependent operator layout with visual separation of modulators and carriers provides unparalleled clarity and navigation.


  • 6-stage (Delay, Attack, Decay1, Decay2, Sustain, Release).
  • 3 slopes: Linear, Exponential, Logarithmic.
  • Tempo-syncable.
  • Loopable.

Modulation Sources:

  • 2 x LFOs, 1 x S&H, 1 x Envelope.
  • Tempo-syncable.
  • 3 voicing modes: Mono Reset, Mono Run, Poly Reset.
    • Monophonic mod sources are global and shared by all voices; Polyphonic mod sources are unique to each voice.
    • Reset/Run - Resets at each key-press / Free-running.
  • Amplitude scaling by modwheel and velocity.
  • LFO1/2 selectable start phase (0°, 90°, 180°, 270°).

Modulation Routing:

  • Pitch and amplitude modulation by 4 modulation sources + modwheel, with 3 modulation polarity modes and 3 convenient modulation ranges.
  • Additional amplitude scaling by Key and Velocity.
  • Envelope rate scaling by Key, Velocity (On + Off), and selectable modulation source.
  • Modulation of Mod Source Rate, Pan, Unison Detune, FM Feedback, and some Effects parameters by any modulation source.


  • Unison with 2/3 voices and variable detune.
  • Portamento (Mode:Off/On/Legato, Rate).
  • Polyphonic (30-voice) and Mono (normal & Legato) voice modes.
  • Pitch bend range, +/- 24 semitone Transpose, variable A440 tuning (+/- 1 semitone in 0.1 Hz increments).
  • Numerous alternate temperament and non-traditional scales.


  • Overdrive.
  • Chorus (Off/Alg1-4, Rate, Depth).
  • Tempo-syncable Delay (Time, Feedback, Level).
  • Reverb (Time, Tone, Level, Off/Mix/Wet Only).
  • Output bit-depth reduction, optional dithering.

Read more, listen to some samples, and grab the demo at http://www.audionebula.ca.

Latest User Reviews

Average user rating of 5.00 from 2 reviews

Reviewed By onailime
May 15, 2020

This Aurora FM synthesizer is really an extraordinary VST synth. I was trying to find a FM VSTi that could reproduce the same kind of elastic sounds as the Yamaha TX81Z I used to own. Like everyone I used Dexed for some time but it does not really deliver and then I slowly lost interest in FM... until I found the Aurora ! If you think all FM synths sound the same, just try to load the same sysex preset in Aurora and then in Dexed, and enjoy the difference. The sound is MUCH clearer and enjoyable in Aurora, it is obvious from the first note that the oscillators and coding are first-rate. Thank you very much for bringing this wonderful synth to us ! It is now one of my go-to vsti's along with Aalto and Chromaphone.

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Reviewed By vrbunkos
May 24, 2019

Aurora FM by Audio Nebula

I nearly let this stunning synth slip under the radar. What a mistake that would have been.

Since I already had Dexed, I thought, "Who needs another DX7 emulator?" Recently, I took another look at Aurora FM, not expecting much in the way of surprises. Now that I've been getting to see and hear for myself what it can do, Aurora FM frankly has become my go-to synth for FM.

What did I discover? The user interface is brilliant. All controls are conveniently laid out before you on a single screen. This synth is all about you, the sound designer, and you, the player: efficient mouse-interaction, instant, meaningful visual feedback. With Aurora FM, it's easy to make live corrections on the fly, to think by ear.

Another shock: this synth is completely about FM, 21st century FM. It's about FM synthesis inspired by modern modulation synth legends like the Alesis Ion and Waldorf Q. So, when Aurora FM is able to load and translate Yamaha DX7/DX21/DX27/DX100/TX81Z/DX11 patches, it's not to emulate or recreate ancient history, but to use them as a starting point to going light years further via today's technology and programming.

Besides, nothing is off the shelf about Aurora FM. It is a very high-resolution, precision musical instrument. In fact, In the short time I've been using this synth, I've come across a whole FM world of beautiful new sound combinations that simply wouldn't have been possible in the mid 1980s. For example, how amazingly musical and fresh the many included micro-tonal scales sound in Aurora's sample precise FM colors.

Rewarding to play, intuitive to program.

Currently with the introductory price of $14 US [$17 CAD].

The introductory exceedingly low price might cause some musicians mistakenly to under-value this fine synth.

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