474.00 excl. VAT


We are proud to present MEGAfm, a result of several years of development.

MEGAfm uses and abuses the vintage YM2612 FM chip originally found in the Megadrive/Genesis games console.


Unlike most FM synthesizers that are very clean and digital, the YM2612 has very characterful tone allowing a broad sound palette ranging from beautiful plucked strings to growly distorted bass lines.


Hardware FM synthesizers are infamous for their reduced controls and complexity to program, with tiny LCD screens and only a couple of buttons to operate a load of menus…
With its 32 operators faders, 14 knobs and 15 buttons MEGAfm offers unprecedented hands-on FM control!

Every knob and fader can easily be modulated by the easy to use LFOs.


The YM2612 chip offers 6 voices of crispy FM, 4 operators per voice and 8 algorithms.
MegaFM features 2 chips for a total of 12voices spread across two outputs (or summed to one)


  • 12 Voice Polyphony
  • Dual YM2612 FM chips (included)
  • 8 Algorithms
  • 600 preset memory (saving to any slot) arranged in 6 banks. Easy upload/download of banks to and from computer vis SYSEX.
  • Preset randomiser
  • 4 Voicing modes (Poly12, stereo/wide6, special CH3 mode, 12 voice unison with detune/fat knob
  • Stereo or Mono output (1 chip per channel or both chips summed)
  • 32 Sliders for total control of all 4 operators
  • 14 knobs
  • 15 buttons
  • 23 LEDS, LED numeric display.
  • 3 lfos to modulate any parameter
  • 7-mode arpeggiator with transposable Sh-style step sequencer
  • Vibrato with depth and rate
  • MIDI clock on all LFOs, ARP and Vibrato
  • All faders/knobs send MIDI (use MegaFM to control your favourite modern FM synth!)
  • Full MIDI automation
  • Dual 6.35mm TS output and 6.35mm Stereo Headphones output
  • Brushed/Anodized Aluminum Case
  • Sturdy metal panel bolted potentiometers
  • Dimensions: 30CM x 13CM x 5CM
  • DIN5 MIDI input with MIDI channel learn and thru/out

Need more presets? Check out the great soundbanks at our friends limbic bits!



User Manual (updated September 24th 2021)

megaFM (MIDI Controller) Vst Mac

megaFM (MIDI Controller)  Vst Windows 32bit

megaFM (MIDI Controller)  Vst Windows 64bit

Please note the plugin is a MIDI controller for MEGAfm only and will not produce any sound without the hardware


Firmware updates:

R2.2 September 24 2021

-Voicing improved in poly12 and wide 6 modes
-Gliding improved (glide between notes played by same finger).
-Better sync of LFO and ARP to MIDI clock (display shows time division when rate knob is moved)
-Square LFO can be inverted (press the square button)
-Saw LFO can be inverted (becomes ramp – press saw button to toggle)
-Choice of Note priority for unison (Low, High, Last) Press retrig in setup to toggle.
-CH3 mode can be duophonic or Stereo mono. Press LFO link 3 in setup to toggle.
-MIDI Bank select implemented
-Fixed bug causing Voice mode to change when exiting setup
-Fixed bug causing the unit to sometimes freeze when uploading a preset bank

Earlier updates

R2.1 September 15 2021

-arp Rec button can be used to save preset faster (bypassing the 3 sec timer)
-Fixed a wide6 voice mode bug causing chips to alternate.
-MIDI CC#7 (volume) ignored to avoid unexpected volume drops in Ableton Live 11

R2.0 September 3rd 2021

-Parameter Pickup (refer to manual for details)
-Faster ARP when in master and MIDI slave mode.
-Fixed big with dual Ch3 mode
-Improved Voice stealing In poly 12 or 6 modes, when searching for available voices MegaFM will sort them by pitch, and use the nearest note = more musical/useful glide
-Sustain pedal latches arp
-Fixed a bug with poly12 not re-triggering voices when sustain pedal is held
-Fixed bug with PA (panel update) not updating all faders

R1.9 April 23rd 2021
-No longer generates MIDI when thru is on (only echoes input)
-All LFOs re-trigger with the arp (when set to retrig)
-No longer displays velocity when lfo1 depth is linked to velocity
-Added alternate firmware with -1 octave offset

Earlier updates

R1.8 Feb 22nd 2021
-Fixed a bug causing inconsistent sounding preset (LFO from previous preset could modulate parameters during new preset load)
-Sends MIDI burst on preset load (to update the VST faders and knobs )
-LED brightness adjustable with vibrato depth knob in Setup Mode
-Optimised LFO engine performance
-Incoming MIDI CC doesn’t update the LED display (could get in the way of UI)
-Global tuning shown on display when adjusting


R1.7 Oct 19th 2020
-Voice Stealing added to wide6 mode


R1.6 Sept 7th 2020
-Improved voice triggering in Poly12 and Poly6 modes (oldest voice fired next so less likely to interrupt a decaying voice).
-Added Voice stealing to dual ch3 mode.
-Fixed a bug with preset dump/receive
-Optimised Led display

R1.5 June 19th 2020
-Fixed a bug that could cause MegaFM to become silent
-LFO LED can no longer conflict with blinking bank LED when changing presets.

R1.4 June 16th 2020
-Voice Mode changes to wide6 when arp is turned on
-Default preset is set to wide6
-Fixed factory bass presets 10-19. Some had issues in 1.3.
(Hold reset at startup to reload factory presets. Warning: This will erase and replace presets 0-50 of Bank1 )

R1.3 May 11th 2020
Added features:
-LFO are bipolar
-LFO shape LED blinks to show LFO rate
-MOD wheel, Velocity and aftertouch can now override the LFO when its rate is zero.
-Aftertouch response smoothed
-Panel recall. Press reset twice to catch all fader/knob parameters
-Fat modes revisited in poly voice modes:
Choose between +/- 1 semitone or +/- 1oct range in setup mode (see manual for details).
-detune fader was not displaying all values correctly.

R1.2 May 6th 2020
Added features:
-Looping Noise LFO – 8,16 or 32 steps
-Preset volume can be ignored on preset change (global)
-Added Midi program change
-Swapped controls for operators 2 and 3
-algorithm MIDI CC range (miss-matched VST editor’s range)
-LFO retriggers on every first key even if retrig is off.
-LED screen no longer displays the received CC value (got in the way of the UI)

R1.1 April 26th 2020
-Improved fader sensitivity
-Improved factory presets
-firmware version displayed at startup
-preset number was not displayed at startup if preset=0.



Additional information

Weight 1.5 kg
Dimensions 32 × 23 × 12 cm