Always consult the Owners Manuals first

Plex Delay block

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Plex Delay block.png

Available on which Fractal Audio products

  • Axe-Fx III: 2x.
  • Axe-Fx II: no.
  • AX8: no.
  • FX8: no.

X/Y and channels

  • Axe-Fx III: 4 channels.
  • Axe-Fx II: n/a.
  • AX8: n/a.
  • FX8: n/a.


The Plex Delay block (Axe-Fx III exclusive) provides up to 8 delay lines in a feedback arrangement for ethereal “shimmer” effects. Previously part of the Multi Delay block in the AX8, FX8 and Axe-Fx II.

It provides these effect types:

  • Plex Delay
  • Plex Detune
  • Plex Shift.

More information in the Owner's Manual.


Parameters table

Parameter Axe-Fx III Axe-Fx II (Multi Delay) AX8, FX8 (Multi Delay)
Type yes
Number of Delays yes
Decay Time yes
Diffusion yes
Low Cut, High Cut yes
Master Time yes
Master Level yes
Master Pan yes
Delay Time 1-8 yes
Tempo 1-8 yes
Level 1-8 yes
Pan 1-8 yes
Threshold, Attack, Release yes
Plex Detune - Crossfade yes
Plex Detune - Detune 1-8 yes
Plex Detune - Master Detune yes
Plex Shift - Direction yes
Plex Shift - Shift 1-8 yes
Ducker Attenuation yes
Ducker Threshold yes
Ducker Release Time yes
Input Diffusion, Diffusion Time yes
LFO Depth, LFO Rate yes
LFO Tempo yes


Diffusion Mix on the Axe-Fx III is the same as Input Diffusion on the Axefx II.

Envelope follower

The Plex Delay has its own envelope follower, allowing volume swells. The manual recommends: Threshold -70, Attack 400 and Release 15.


Camilo Velandia's Plex demo.