Vocal Distortion
Headrush Vocal FX

Vocal Distortion

Inspired by HeadRush® Original

Effect of vocal saturation/distortion with:

  • gain stage (drive)
  • pre and post filters
  • wet/dry control

It is used for:

  • light grit (pop/rock)
  • radio voice / lo-fi
  • extreme effects (industrial, trap)

Control Parameters

Drives%
  • Range: 0 – 100%
  • Function: amount of distortion (gain)

Behavior:

  • 0–20% → light saturation (warm)
  • 30–60% → vocal crunch/grit
  • 70–100% → heavy distortion / fuzz

Technically:

increases harmonic clipping

more drive = more compression + harmonics

Mix%
  • Range: 0 – 100%
  • Function: blend between clean and distorted signal
  • 0%: dry only
  • 50%: parallel distortion
  • 100%: full wet

essential for maintaining vocal intelligibility

VolumedB
  • Typical range: ~−12 → +12 dB
  • Function: output gain of the block

It is used for:

  • compensate for increased volume due to distortion
  • balance in the chain
Pre HPFHz
  • Typical range: ~20 – 1000 Hz
  • Cuts low frequencies before drive

Effect:

  • louder → less “mud”, cleaner distortion
  • bass → fuller/dirtier sound

essential to avoid confusing distortion (HPF removes unnecessary bass) (Develop Device)

Pre LPFHz
  • Typical range: ~1kHz – 20kHz

Cuts high frequencies before drive

Effect:

  • lower → dark/vintage distortion
  • high → more presence and aggressiveness
Pre Type6 / 12 / 24 dB

Filter slope type

  • 6 dB: soft (natural)
  • 12 dB: medium
  • 24 dB: aggressive / surgical

more dB = sharper cut

Post HPFHz

Removes bass generated by distortion.

Useful for:

  • clean the mix
  • avoid live rumble
Post LPFHz

Cuts harsh high frequencies

Effect:

  • 6–10 kHz → warmer sound
  • 12 kHz → more brilliance

Fundamental to avoid:

  • harshness
  • digital “fizz”.
Post Type6 / 12 / 24 dB
  • same logic as the Pre Type
  • controls how drastic the final filter is

Pro Tips

THE PRE filters influence the character of the distortion.

THE POST filters they clean the final result.

Too much drive without HPF → “muddy” sound.

Too low LPF → unintelligible voice.

Quick Reference

  • Drives (%): amount of distortion
  • Mix (%): dry/wet blend
  • Volume (dB): output level
  • Pre HPF: low cut first
  • Pre LPF: high cut first
  • Pre Type: pre-filter slope
  • Post HPF: low cleaning after
  • Post LPF: I'll check the others later
  • Post Type: rear filter slope

Setup Examples

Warm saturation (pop/rock)

Drive20–35%
Mix40–60%
Pre HPF80–120 Hz
Post LPF10–12 kHz

Light analog warmth

Radio / Lo-Fi

Drive40–60%
Mix70–100%
Pre HPF200–400 Hz
Pre LPF3–6 kHz
Post LPF4–8 kHz

Telephone effect / mid-focused

Aggressive distortion (trap / industrial)

Drive70–100%
Mix80–100%
Pre HPF120–200 Hz
Post LPF6–9 kHz
Post Type24 dB

Controlled but heavy sound