300 voice polyphony
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The EssenceFM is one of the most powerful and easy to use FM synthesizer ever made.
It provides tons of features to make sound creation fun and enjoyable.

Screenshot of an algorithm made of different connected operators Design your own FM algorithms by connecting operators together.
Create complex looped envelopes in seconds.
Screenshot of the waveform drawing interface New waveforms can be drawn with your fingers or imported from wave files.
Screenshot of the patch page Combine several FM voices to make huge sounds, with split points, round robin and other advanced features
Screenshot of the Voice Sequencer The powerful Voice Sequencer allows you to trigger layers to create rhythmic and interesting sound textures.
EssenceFM front panel view Try, experiment, destroy, re-build... The Undo/Redo keys are here to help you explore FM synthesis.
Schematic showing how the EssenceFM can be integrated in a studio Wide set of inputs and outputs for easy integration in your studio or live setup.
Schematic showing the EssenceFM touch screen Super-responsive capacitive touch screen with multitouch support.

And much more...

  • Support for mictrotonal scales
  • Per-voice multimode filter (300 filters) to shape your sounds like on an analog synthesizer.
  • Powerful modulation matrix with 8 entries per voice
  • Two multi-effect processors and 4 assignable, balanced stereo outputs
  • Multiple MIDI inputs (DIN, USB & Ethernet) that can be used simultaneously
  • Can be used in a rack or as a table-top module
  • 24-bit DAC with isolated analog outputs

EssenceFM front  view
EssenceFM front panel view
Comes with 500 voices and 400 patch presets.

User manual

Powerful FM engine

The EssenceFM engine allows to create ridiculously powerful sounds made of more than 6 operators. That's why we gave it 300 voices of polyphony, you get the easy-to-program 6 op FM synthesis and the ability to layer many voices to create huge, rich-souding instruments.
There are 1800 operators and 4200 envelopes running at the same time, more than you will ever need.


Sound Engine
Synthesis typeHybrid FM/subtractive (6-op FM with filter)
Polyphony (6-op mode)300 voice
Operator controlMultiplier (x0...x40) or fixed frequency (0Hz...25Khz)
Quartertone & fine tuning
Key volume scaling (graphical)
LFO AM/FM amount
Waveform & waveform phase
Velocity sensitivity
Waveforms24 editable waveforms
Rendering enginesHigh quality FM (realtime interpolated waveforms)
Oldschool FM (no interpolation)
Waveform editionFree on-screen drawing, import from wave file.
Operations : Flip X, Flip Y, Smooth, Set volume, Remove DC, Mix two waveforms, Crossfade, Maximize, Add harmonic
Envelope generator6-points graphical, logarithmic or linear, with loop point.
14 envelopes per voice (6x volume, 6x pitch, 1x filter, 1x pan) useable as modulation matrix sources or to simulate additional LFOs.

Envelope segment min. duration: 0.5ms
Envelope segment max. duration: 29 seconds
Patch layer parametersVolume
Bottom/Top key
Bottom/Top velocity
Exclusion Group (8 groups)
Round Robin (32 slots)
Filter1 per voice, multimode (lowpass, highpass), resonant
LFO1 per voice, waveform + bitmask combination
Waveform phase (fixed or random), delay & attack rate control
Independent or Common phase for each note
Speed can be hard set or synced to MIDI clock.
Max. Voices per patch128 layers/splits
Max. Total Voices3328 (26 banks * 128 voices)
Max. Total Patches3328 (26 banks * 128 patches)
Max. Total Performances256
Modulation matrix8 source/destination mappings per voice
Choose between 139 sources and 224 destinations
Scaling and Offset parameters
Modulation matrix SourcesNote number
Release Velocity
Poly. Aftertouch
Pitchbend Wheel
Number of active notes
Envelope (pan, filter, operator volume/pitch)
Random number generator
MIDI CC (0...127)
MIDI Clock (BPM)
Modulation matrix Destinations Operator Volume
Operator Frequency Mult
Operator Frequency Coarse
Operator Frequency Fine
Operator Waveform
Operator Initial Phase
Operator LFO AM Depth
Operator LFO FM Depth
Operator Volume Envelope Speed
Operator Volume Envelope Segment 1-6 Time
Operator Volume Envelope Point 1-6 Height
Operator Pitch Envelope Speed
Operator Pitch Envelope Segment 1-6 Time
Operator Pitch Envelope Point 1-6 Height
LFO Speed
LFO Global AM Depth
LFO Global FM Depth
LFO Waveform
LFO Mask
LFO Phase
Filter Cutoff (override)
Filter Cutoff (keep envelope)
Filter Dry/Wet ratio
Filter Resonance
Filter Envelope Speed
Filter Envelope Segment 1-6 Time
Filter Envelope Point 1-6 Height
Pan Envelope Speed
Pan Envelope Segment 1-6 Time
Pan Envelope Point 1-6 Height
Sound engine internal resolution32-bit float
Scales/Temperaments32 editable presets
Custom scales up to 32 notes, 0-1200 cents tuning, octave stretching
SCALA file import
Transposition+36/-36 semitones. Global, per patch and per voice
DAC24-bit, 48Khz
SNR> 100dB
Audio latency< 2ms
Boot time< 3s
Voice Sequencer1 per patch (300 total), 128 events, 128 steps resolution grid, 1-500 BPM tempo, syncable to MIDI beat
An event contains a voice number, note number, duration and volume. It can trigger notes or dynamically swap the FM parameters with another voice
Multitimbrality300 voice / 16 parts assignable to any MIDI channel
Advanced MIDI featuresGlobal MIDI filters by message and by channel
Raw MIDI hex monitor
Real-time CC monitor
Built-in MIDI file player (format 0 &1 support, 32 tracks max)
Custom velocity curves
Built-in MIDI merger that merges MIDI DIN, USB and internal MIDI player commands.
General MIDI support: patch bank C for the 128 melodic instruments, patch D0 for the GM-compatible drum kit
MPE support (without Common Channel)
MiscDX7 patch import (via SysEx: single-voice, via USB: single-voice & 32-voice dumps).
Random voice generation
Effect Processors2 multi-effect processors with independant Send level for each part
3 modes:
Available Effects
Reverb (7 types)ReflectionDamping
Stereo DelayTemps LTemps RFeedbackCutoff
Stereo ChorusSpeed LSpeed RDepth
Distortion (5 types)ThresholdGainCutoff
BitcrushFrequencyBit reductionCutoff
Ring ModSpeed (coarse)Speed (fine)
RotaryRotor SpeedStereo DepthDistortion
3-Band EQLow FreqHigh FreqLow GainMid GainHigh Gain
PhaseShiftLeft SamplesRight Samples
Long Tap DelayDelay LDelay RFeedbackCutoff2nd Tap Delay
ShimmerReflectionDampingRoom sizeShimmer Amount
Mixage monoModeGain
Internal Resolution48Khz, 32-bit float
AutomationWith CC, see MIDI implementation
Audio8x 6.35mm jack outputs, balanced, useable as 4 stereo pairs or 8 mono.
Stereo 6.35mm unbalanced headphones jack output
MIDIDIN (In, Out, Thru), RTP-Ethernet (AppleMIDI), USB device, USB host
USB host capabilitiesUSB mass-storage (USB sticks and drives, FAT32 or exFAT formatted)
MIDI standard interface (compatibility is not guaranteed with all devices)
USB device capabilitiesUSB 1.1 Full-Speed MIDI class-compliant device (no drivers required)
Power inputDC IN 12V 2A
Session typeAppleMIDI
IPUser-defined or using DHCP
PortUser-defined (default 5004/5005)
Network latency0-3ms (normal use)
0-1ms (display disabled)
Type7" IPS capacitive touch screen
Multi-touch support
Resolution400*240, 16-bit (65536) colors
Viewing angle160° horizontal
160° vertical
(Calculated for text readability. Colors may change depending on angle.)
Refresh rateFixed, 60 FPS
Fonts3 types
Background5 types
Color schemes14 types
OtherAdjustable backlight brightness
Dim/Turn off the screen after a delay
Background pattern and color selection
Touch screen calibration
Blue level adjustment
Sound feedback on touchscreen
Key LED backlight enable/disable
Edition, Memory & Storage
ControlsTouchscreen, 14 mechanical switches, 7 rotary encoders, 2 volume pots (main output & headphones)
Virtual keyboardQWERTY, QWERTZ, AZERTY
Undo/Redo history1024 steps
Global memory protectionWrite protect option for Patches, Voices, Performances, Scales and Waveforms
Import/ExportPatches, Voices, Performances, Scales and Waveforms from USB mass-storage devices.
Firmware upgradeVia USB
AccessoriesUniversal AC adapter, user manual, 4x tabletop brackets, 4x screws, hex screwdriver
Size (EssenceFM)133 x 482.6 x 58 mm
Weight (EssenceFM)1750 g
Size (package)610 x 160 x 160 mm
Weight (package)3.127 kg
Operating Temperature0 ~ 40°C
Power consumption< 10W
Power adapterUniversal wall adapter, AC 100-240V


The EssenceFM uses a powerful ARM CPU to process the sound.
Our engine heavily relies on multicore optimizations and low-level assembly code running without any underlying operating system, allowing for incredible capabilities and one of the quickest boot time you'll find on any modern synthesizer (3 seconds).