Source Audio Spectrum Filter — MIDI Editor & CC Reference
Control the Source Audio Spectrum Filter from your browser — MIDI control reference, interactive editor, and AI-generated presets. Free, no install.
Explore the Spectrum Filter 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
INPUT
CC 1
Input signal level going to the processor. Turn down for active pickups, up for passive pickups. Calibrate until the center LED flashes red.
DEPTH
CC 3
Filter modulation depth — how wide the filter sweeps across the frequency spectrum. Higher values make the filter effect more prominent.
FREQ
CC 5
Frequency starting point of the filter modulation. Left = lower frequencies (darker), right = higher frequencies (brighter).
SPEED
CC 7
Envelope attack/decay speed (or LFO speed when using LFO modulation). Right = quick, snappy envelope; left = slower, more sweeping sound.
Alt / Secondary Knob Functions
Control
MIDI CC
Description
SENSE
CC 2
Envelope filter sensitivity — how reactive the filter is to incoming signal dynamics. Lower for a smoother, more relaxed envelope; higher for sharper response to lighter playing.
MIX
CC 4
Wet/dry mix balance between the natural dry tone and the affected wet signal. 50/50 mix is at roughly 12 o'clock.
RES
CC 6
Filter resonance (Q). Boosts the height of frequency peaks and deepens the notches in frequency cuts. Higher values create more pronounced, vocal-like filter sweeps.
VOL
CC 8
Master output volume. Unity gain is at approximately 12 o'clock.