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HARSH
PROCESSOR
HARSH
FILTER
Extreme frequency filtering for harsh noise and experimental audio processing.
Features aggressive resonance, self-oscillation, and unpredictable filtering behaviors.
NODE SCREENSHOT
PLACEHOLDER
PLACEHOLDER
INPUTS
audio
AUDIO
Any ComfyUI audio format
Input audio to be filtered.
filter_type
ENUM
lowpass, highpass, bandpass, notch, allpass, comb, formant, chaos
Filter topology and response characteristics.
frequency
FLOAT
20.0 - 20000.0 Hz
Center/cutoff frequency for filtering.
resonance
FLOAT
0.1 - 20.0
Filter resonance/Q factor. High values = self-oscillation.
drive
FLOAT
0.1 - 10.0
Input gain/drive amount for filter saturation.
harshness
FLOAT
0.0 - 2.0
Aggressive character control. Higher = more extreme.
OUTPUTS
audio
AUDIO
Same format as input
Harshly filtered audio output.
LOWPASS
Removes high frequencies with aggressive rolloff and resonance.
BASS EMPHASIS
HIGHPASS
Cuts low frequencies creating thin, aggressive textures.
TREBLE FOCUS
BANDPASS
Isolates frequency bands with extreme resonance peaks.
BAND ISOLATION
NOTCH
Extreme frequency notching creating hollow resonances.
FREQUENCY CUT
ALLPASS
Phase manipulation without amplitude changes.
PHASE SHIFT
COMB
Delay-based filtering creating metallic resonances.
METALLIC TONE
FORMANT
Vocal formant filtering for speech-like textures.
VOCAL CHARACTER
CHAOS
Unpredictable filtering with random parameter modulation.
CHAOTIC BEHAVIOR
FILTERING EXAMPLES
HARSH NOISE WALL
WHITE NOISE →
HARSH FILTER →
MULTI DISTORTION
| PARAM | VALUE | PURPOSE |
|---|---|---|
| filter_type | bandpass | Frequency focus |
| frequency | 2000 | Mid-range emphasis |
| resonance | 15.0 | Self-oscillation |
| harshness | 2.0 | Maximum aggression |
METALLIC RESONANCE
PERLIN NOISE →
HARSH FILTER →
CONVOLUTION REVERB
| PARAM | VALUE | PURPOSE |
|---|---|---|
| filter_type | comb | Metallic character |
| frequency | 440 | Musical pitch base |
| resonance | 8.0 | Strong resonance |
| drive | 4.0 | Filter saturation |
CHAOTIC MODULATION
TRUE CHAOS →
HARSH FILTER →
GRANULAR PROCESSOR
| PARAM | VALUE | PURPOSE |
|---|---|---|
| filter_type | chaos | Unpredictable filtering |
| frequency | 1000 | Center frequency |
| resonance | 12.0 | Extreme resonance |
| harshness | 1.8 | High aggression |
HARSH FILTERING
High resonance values (10+) cause filter self-oscillation
Drive parameter saturates filter input for more aggressive character
Bandpass mode creates focused frequency emphasis
Chaos mode adds unpredictable parameter modulation
Comb filtering creates metallic, ringing resonances
Harshness parameter pushes filter behavior to extremes
Use high Q values for piercing, aggressive sounds
Formant mode adds vocal-like character to noise
Notch filtering creates hollow, ghostly textures
Combine with distortion for maximum sonic destruction
