neural dsp · floor modeler

Quad
Cortex

Neural DSP Quad Cortex
start learningthe Quad Cortex
not connected
plug in over usb
firmware
coros 4.0.1
reviewed
aug 13, 2026

real amps, each read from its schematic, ready to send to your Quad Cortex.

installs straight to a slot

the guide

7 chapters

your Quad Cortex models → the real amp

01

6 of 42 real amps8 of 42 real ampsevery Quad Cortex model

top for your Quad Cortex

02

read this first

03

five things that explain almost every problem.

  1. 01

    eleven footswitches, and they all turn.

    Eleven footswitches, all of them rotary encoders. BANK DOWN and TEMPO end the two main rows; BANK UP sits up by the screen.

  2. 02

    a second reverb needs the other path.

    A second reverb on the same path will not load, even with the CPU meter at a third. The limit is per path, not global. Move the block to the other path. Deleting other blocks does not help.

  3. 03

    set the input to 0 dB, then check the meter.

    Start at 0 dB, the default. Then play a little harder than usual: the meter should just tickle the red, or sit just below clipping. Move the level only if it doesn’t. The whole check takes two minutes.

  4. 04

    scenes inside a song, presets between songs.

    Presets reload the whole rig. Scenes recall settings inside a rig that’s already loaded, so they switch instantly. Build each song as one preset with scenes. Three presets for one song leaves audible dropouts mid-song.

  5. 05

    IN LEVEL sets your capture. INST LEVEL does not.

    INST LEVEL sets how hard the device being captured is driven. IN LEVEL sets the return signal the capture is made from. Mix them up and the capture comes out at the wrong level or feels wrong to play.

presets for your Quad Cortex

04

42 with a factory model matchpresets for Quad Cortex

learn · 10 lessons · 73 min

05

start at the beginning. unbox to first gig, in order.

  1. 01what you actually bought6
  2. 02your first 15 minutes7
  3. 03gain staging, properly9
  4. 04the Grid8
  5. 05the DSP budget7
  6. 06modes, scenes and setlists8
  7. 07playing through a real amp6
  8. 08your first capture9
  9. 09Cortex Control and backups6
  10. 10playing live7

reference · 17 pages

06

look it up fast. tables, diagrams, and fixes.

  • inputs and outputsinteractive
  • Cortex Control, plugins and Wi-Fi
  • specifications
  • amp and capture decoderonly here
  • tone recipesinteractive
  • making capturesonly here

open the reference

installing presets

07

presets install straight into a slot you pick.

full steps

two ways in

make the Quad Cortex make sense.

learn it in order, or look it up fast

the cheat sheet and the tutorial, in one place. How the Grid works, how to set gain, and the per-path limits the CPU meter does not show.

why you can trust this

every claim carries its source

This guide was assembled from Neural DSP’s manual, FAQ, product documentation and CorOS release notes, plus their community forum and the community wiki. The panel diagrams were read off the hardware itself. Facts are labeled by where they came from.

Some things about this device are documented only by owners comparing notes, not by Neural: the per-path DSP limits and the capture level conventions. They are the only account that fits the behavior, and they are marked community-sourced.

how this was sourced where sources disagree