FunBox
Mercury
v1
Firmware

Mercury

Hype41/100

Mercury is a Amp emulator running Neural Amp Modeler (NAM) for the Funbox pedal with Daisy Seed.

Mercury is custom firmware for the GuitarML FunBox, by @GuitarML. Open source under BSD-3-Clause, latest release v1 (January 2025), 20 stars on GitHub.

forGuitarML FunBox·by@GuitarML

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mercury.bin· 160 KB

BSD-3-Clause· GuitarML/Mercury·downloads come from the creator’s GitHub releases

Mercury (Planet Series)

Mercury is an amp sim using Neural Amp Modeler (NAM). It includes 9 custom size neural models and a 4 band EQ (Bass, Mid, Treble, Presence). It is intended to be used with a separate IR/CabSim, or an actual amp (no cab modelling on Mercury).

Neural Network inference for the amp/pedal models uses RTNeural with RTNeural-NAM.

Note: Due to the processing power required for the neural models, Mercury is a mono effect, which on the Funbox pedal is copied left to right channel for output. If a stereo signal is going into the input, Mercury will only take the left channel for processing.

app

*Models included: Low Gain:

  • Matchless SC30
  • Twin Reverb
  • Dumble Low Gain (from kit build)

Medium Gain:

  • Dumble Higher Gain (from kit build)
  • Ethos Tube Pedal
  • JCM800 Medium Gain

High Gain:

  • Mesa iib
  • Splawn
  • PRS Archon

Controls

ControlDescriptionComment
Ctrl 1GainIncreases the input gain to the neural model up to 2.5x
Ctrl 2LevelOverall volume
Ctrl 3Presence+10/-10 dB Presence control, center is 0.
Ctrl 4Bass+10/-10 dB Bass control, center is 0.
Ctrl 5Mid+10/-10 dB Mid control, center is 0.
Ctrl 6Treble+10/-10 dB Treble control, center is 0.
3-Way Switch 1Amp/Model Group3 available groups, default: left: LowGain, center: MedGain, right: HighGain
3-Way Switch 2NAM Model Select3 available NAM models for each group*
3-Way Switch 3Unused
Dip Switch 1
Dip Switch 2
FS 1Bypass
FS 2Preset
LED 1Bypass Indicator
LED 2Preset Indicator
Audio In 1Mono In (Left Channel)Right channel ignored if using TRS
Audio Out 1Mono OutLeft channel copied to Right Channel if using TRS

MIDI Reference

ControlMIDI CCValue
Knob 1140- 127
Knob 2150- 127
Knob 3160- 127
Knob 4170- 127
Knob 5180- 127
Knob 6190- 127

Build

Mercury runs in SRAM memory on the Daisy Seed. You must use the Bootloader to load the executable.

Mercury is intended to be used as a submodule in Funbox, and build paths expect to be used as such. The Mercury code was split out from the Funbox project to preserve the License used in reused/modified code from other projects. To build Mercury, it is recommended to clone the Funbox project and run "git submodule update --init --recursive" to get Mercury and all required dependencies. Otherwise, you can download the .bin executable to upload to the Daisy Seed from the Releases page.