
Headrush Dynamics & EQ
Acoustic Sim
Inspired by Boss® Acoustic Simulator
Emulate one's response microphoned acoustic guitar
Work on:
- Dynamic EQ
- body resonances
- transients
Useful for:
- live without changing guitar
- fast recordings
- improve piezo too much “plasticosis”
Control Parameters
Level%
- Range: 0 – 100%
- Function: effect output level
Behavior:
- balance the volume with respect to the chain
- It doesn't affect the tone
equivalent to output gain
Bodysuits%
- Range: 0 – 100%
- Function: simulates the resonance of the acoustic guitar body
Effect:
- 0–20% → thin / direct sound
- 30–60% → natural
- 70–100% → very full / “boomy”
emphasize:
- low frequencies (≈100–300 Hz)
- wood resonances
Tone%
- Range: 0 – 100%
- Function: global timbral balance
Effect:
- low → dark / warm
- medium → natural
- high → bright / presence
acts as EQ tilt (low vs high)
Modes
Select the acoustic response model
- Standard: Balanced acoustic emulation
- use:
- strumming
- generic situations
- Jumbo: Large body (dreadnought/jumbo type)
- Effect:
- lower
- more perceived volume
- ideal for:
- accompaniment
- full sounds
- Enhance: Improves an already “acoustic” signal
- Effect:
- more definition
- less coloring
- perfect for:
- already decent piezo
- semi-acoustic guitars
- Piezo: Optimized for piezo pickups
- Effect:
- reduces harshness
- blunts high artificials
- transforms the “plasticky” sound into a natural one
Pro Tips
- Too much Body → “boomy” / slurred sound
- High tone → can become harsh
It doesn't totally replace a real acoustic, but it is very convincing live.
Works best with:
- clean single coil or humbucker pickups
- undistorted signal
Quick Reference
- Level (%): output volume
- Body (%): body resonance
- Tone (%): timbral balance
- Modes: simulation type
Setup Examples
Realistic acoustic simulation
ModeStandard
Body40–60%
Tone50–60%
Levelmatch volume
Natural live sound
Full strumming (band)
ModeJumbo
Body60–80%
Tone50%
Big and present sound
Harsh piezo correction
ModePiezo
Body30–50%
Tone40–55%
Eliminate “plastic sound”
Lightweight enhancer
ModeEnhance
Body20–40%
Tone60–70%
Improve without distorting

