Source Audio Mercury Flanger — MIDI Editor & CC Reference
Control the Source Audio Mercury Flanger from your browser — MIDI control reference, interactive editor, and AI-generated presets. Free, no install.
Explore the Mercury Flanger controls in your browser and connect compatible MIDI hardware to send settings to your pedal. The reference below shows the controls mapped in Nitelite; available functions depend on the pedal and firmware. The default MIDI channel in Nitelite is 1. Browser MIDI control works in Chrome, Edge, Opera, or Brave — no install required.
Knobs
Control
MIDI CC
Description
DEPTH
CC 1
Controls the depth of the LFO, determining how prominent the flanger effect is. Fully counter-clockwise is most subtle, fully clockwise is most prominent.
SPEED
CC 2
Controls the frequency of the LFO (1-10 Hz). Determines how fast the flanger effect cycles. When MIDI Clock is active, controls beat subdivisions instead (quarter/eighth/triplet/sixteenth).
RESONANCE
CC 3
Sets the resonance of the peak/notch filters in the flanger effect. Higher resonance produces a more metallic, bell-like or chime-like sound; lower resonance is more subdued.
DELAY
CC 4
Sets the base delay time for the flanger effect. Lower delay times create a pronounced tape-style "whoosh" sound, longer delay times produce a less pronounced effect that can resemble a chorus.
Alt / Secondary Knob Functions
Control
MIDI CC
Description
MIX
CC 5
Wet/dry mix control. Available as a Neuro App parameter. WET+ boosts wet signal, CLEAN is equal mix, WET- attenuates wet signal.
OUTPUT LEVEL
CC 6
Overall output level of the effect. Available as a Neuro App parameter.
LO RETAIN
CC 7
Preserves low-frequency content through the effect. Available as a Neuro App parameter.
TREMOLO
CC 8
Adds a tremolo (volume modulation) effect on top of the flanger. Available as a Neuro App parameter.