EQ Node

A 5-band fully parametric equalizer with multiple filter types and a global tilt control.

Overview

Property	Value
Category	Effects / EQ
Version	1
Inputs	L, R (audio)
Outputs	L, R (audio)

Parameters

Per-Band Parameters (Bands 1-5)

Each band has identical controls:

Parameter	Range	Default	Description
Enable	On/Off	On	Band bypass
Type	See below	Bell	Filter type
Frequency	20Hz - 20kHz	Varies	Center frequency
Gain	-18dB - +18dB	0dB	Boost/cut amount
Q	0.1 - 10	1.0	Bandwidth (higher = narrower)

Filter Types

Type	Description	Use Case
Bell	Symmetrical boost/cut	General shaping
Low Shelf	Boosts/cuts below frequency	Bass adjustment
High Shelf	Boosts/cuts above frequency	Air, brightness
Low Pass	Removes frequencies above	Darkening, filtering
High Pass	Removes frequencies below	Rumble removal
Notch	Narrow cut	Removing resonances

Global

Parameter	Range	Default	Description
Output Gain	-12dB - +12dB	0dB	Master output level
Tilt	-6dB - +6dB	0dB	Tilt EQ (bass↔treble balance)

Default Band Frequencies

Band	Default Frequency	Typical Use
Band 1	80 Hz	Sub bass, rumble
Band 2	250 Hz	Low mids, warmth
Band 3	1 kHz	Midrange, presence
Band 4	3 kHz	Upper mids, clarity
Band 5	10 kHz	Air, brilliance

Visualizer

The Frequency Response Visualizer shows:

• Combined EQ curve
• Individual band contributions
• Real-time frequency spectrum (optional)

Tips

• Use High Pass on Band 1 to clean up low-end rumble
• Tilt is great for quick tonal balance adjustments
• Use narrow Q (high values) for surgical cuts
• Use wide Q (low values) for musical boosts
• Enable only the bands you need to save CPU

Example Presets

Vocal Polish

• Band 1: High Pass @ 80Hz
• Band 2: Bell -3dB @ 250Hz, Q=1.5 (reduce mud)
• Band 3: Bell +2dB @ 3kHz, Q=1.0 (presence)
• Band 5: High Shelf +3dB @ 10kHz (air)

Guitar Scoop

• Band 2: Bell -4dB @ 400Hz, Q=0.8
• Band 3: Bell +3dB @ 2.5kHz, Q=1.2

Mix Tilt

• Tilt: +2dB (brighter overall balance)
• Output Gain: -1dB (compensate)