Always consult the Owners Manuals first.
Note: the wiki is currently being updated with information about the FM3.

Plex Delay block

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Revision as of 10:43, 2 February 2019 by Yek (talk | contribs) (Parameters)
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Plex Delay block.png

Available on which Fractal Audio products

  • Axe-Fx III: 2 blocks
  • Axe-Fx II: see Multi Delay
  • AX8: see Multi Delay
  • FX8: see Multi Delay

X/Y and channels

  • Axe-Fx III: 4 channels
  • Axe-Fx II: see Multi Delay
  • AX8: see Multi Delay
  • FX8: see Multi Delay

What is the Plex Delay

The Multi Delay block in the Axe-Fx II, AX8 and FX8 is split into the Multitap Delay, Ten-Tap Delay and Plex Delay blocks.

The Plex Delay block (Axe-Fx III exclusive) provides up to 8 delay lines in a feedback arrangement for ethereal “shimmer” effects. It provides these effect types:

  • Plex Delay — Delays
  • Plex Detune — Detuned delays
  • Plex Shift — Pitch-shifted delays
  • Plex Verb — Large, ethereal reverb sounds. This type is also simple to use with no time, tempo, level or pan parameters required. For best results turn the Diffusion Mix up when using this type.

More information in the Owner's Manual.

Camilo Velandia's demonstrates the Plex Delay


Parameters table

Parameter Axe-Fx III Axe-Fx II (Multi Delay) AX8, FX8 (Multi Delay)
Type yes
Config - Number of Delays yes
Config - Decay Time yes
Config - Diffusion yes
Config - Low Cut, High Cut yes
Masters - Input Gain yes
Masters - Master Time yes
Masters - Master Level yes
Masters - Master Pan yes
Delay Time 1-8 yes
Tempo 1-8 yes
Level 1-8 yes
Pan 1-8 yes
Envelope Controller - 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
Spread yes
Pre Delay yes


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

Envelope follower

The Plex Delay has its own envelope follower, allowing volume swells. The Owner's Manual recommends these settings: Threshold -70, Attack 400, Release 15.


Values beyond +/-100% increase the apparent image beyond the stereo field.

Low Cut, High Cut

"When using the Plex Verb the Low Cut and High Cut are very powerful controls. For pad-like sounds try Low Cut around 250 and High Cut around 2K. Experiment with different values to create different textures." source