fix it

Firmware or settings in a bad state . Fix: Hold footswitches A and H during the first six seconds of the splash screen to reach Recovery Mode. Choose Reset Settings first—it keeps your presets and captures. Only use Factory Reset, which wipes everything, if Reset Settings doesn't clear it.

Something plugged in is holding it up . Fix: Disconnect every cable except power, wait 30 seconds, then try again. Neural recommend this before a factory reset.

You have hit a per-path limit, not the CPU ceiling . Fix: Move the block to the other path. Rows 1 and 2 are one pair, rows 3 and 4 are the other, and the reverb limit is enforced per pair—with spring reverbs excepted.

Bypassed blocks are still costing you . Fix: Bypassing does not reduce CPU consumption. Delete what you are not using instead of switching it off.

Those presets are over the processing budget . Fix: Global EQ and the Input Gate are automatically disabled when a preset exceeds available resources, without an error. Delete a block from the affected preset.

That jack has no connection sensing . Fix: OUT 1/L, OUT 2/R and CAPTURE OUT do not sense connections. They will never change color. Nothing is wrong.

The input TYPE is set to Mic, not Instrument . Fix: Swipe down → I/O Settings → your input → set TYPE to Instrument. The combo jacks take both a mic and a guitar, and the switch decides which one the modeler expects. On Mic with a guitar plugged in it sounds thin and no amount of gain corrects it.

A ground loop . Fix: Turn on GROUND LIFT. There is one in I/O Settings for every input, every FX return and every output—lift the one on the connection that is humming. You do not need a special cable.

TS cable on a quarter-inch output . Fix: OUT 3/L and OUT 4/R are balanced. A TS cable halves the output voltage—you need 6 dB back to reach unity.

Volume knob is not maxed while you set levels . Fix: Set the knob to maximum, get the levels right on the Grid and in I/O Settings, then trim the knob for the room. Otherwise the meters do not describe what leaves the jacks.

Input stage too hot for your pickups . Fix: Swipe down → I/O Settings → the input. Play a little harder than usual. The meter should just tickle the red. If it buries it, pull IN 1 LEVEL down.

Not enough headroom on a clean patch . Fix: Leave 12 dB of headroom on clean tones and 6 dB on distorted ones. Clean patches peak much higher than they feel.

Input and Output blocks are telling you and you haven't looked . Fix: Both flash red when clipping. That is the meter—find which one is flashing and fix that stage.

Input level is global . Fix: It is not stored per preset and a scene cannot change it. Set it so your hottest guitar does not clip, then make up the difference with a gain block inside the presets that need it.

You are changing presets where scenes would do . Fix: Presets reload the whole rig. Scenes recall settings inside a rig that is already loaded, and switch instantly. Build the parts of one song as scenes A–H inside a single preset.

An amp block is still in the preset . Fix: Two amps in series causes phase problems. Remove the amp block when you are running into a real amp.

A cab block is still in the preset . Fix: Turn on Global Bypass. It disables every cab, IR and capture block across all presets at once.

The send is running at line level . Fix: Sends are line level at unity by default. Pedals expect instrument level—pull the send down, starting around −5 dB.

It was resampled and truncated on upload . Fix: Every IR is converted to 48 kHz and resized to 1,024 samples—about 21 ms. A long IR with a real tail does not survive that. Nothing you can do on the modeler changes it.

Weak signal . Fix: You need −60 dBm or better. Move the router, move the modeler, or use a phone hotspot with “Maximize Compatibility” enabled.

Network configuration . Fix: Use 2.4 GHz or mixed mode, split mixed bands into separate SSIDs, avoid special characters in the network name, assign the modeler a static IP, and prioritize its traffic in QoS.

Missing USB Audio Driver on Windows . Fix: Windows needs Neural's USB Audio Driver installed separately. macOS does not.

Wrong cable . Fix: The Quad Cortex uses USB Type B—the square printer connector. A USB-C cable from a Nano Cortex will not fit.

Firmware behind the app . Fix: Cortex Control expects the latest CorOS. Since 4.0.0 the two share a version number, so mismatches are easy to spot.

It's a subscription or trial license . Fix: Only perpetual licenses transfer to the hardware. There is no workaround.

Never verified online . Fix: The modeler needs internet once to verify. After that it runs offline indefinitely.

INST LEVEL and IN LEVEL confused . Fix: INST LEVEL sets how hard the captured device is driven and does not affect the capture. IN LEVEL is the return signal and is the level that matters. Wrong volume means IN LEVEL; wrong feel means INST LEVEL.

Both left at 0 dB for an amp capture . Fix: Use about −12 dB for clean amps and −6 dB for distorted ones. 0 dB on both leaves no headroom.

Auto-set used on a pedal . Fix: Auto-set gives inconsistent results on pedals. Set both levels to 0 dB by hand so the capture matches the pedal.

Expression assignments are per-preset . Fix: There is no global expression assignment—every preset that needs the pedal has to have it assigned. Build it into your template preset before you make copies.

Rows 2 and 4 always carry them . Fix: They cannot be fully removed. Drag the S icon fully left and the M icon fully right, then exit to Grid view and delete the empty split rows.

This browser has no WebHID, which one-click install uses to reach the Quad Cortex . Fix: Open this page on a computer in Chrome or Edge. There is no file to download—the preset installs straight to the modeler over USB.

Cortex Control holds the USB connection exclusively while it runs . Fix: Quit Cortex Control completely, then connect again. Closing its window does not quit the app.

The modeler is off, or the USB cable is not plugged into the computer . Fix: Connect your Quad Cortex via USB and power it on.

Nothing was picked in the browser prompt . Fix: Click connect again and pick your Quad Cortex in the browser prompt.

Cortex Control is holding the USB connection . Fix: Quit Cortex Control if it is running, then connect again.

Cortex Control or the modeler’s own screen was busy with the preset list . Fix: Quit Cortex Control, leave the modeler on its home view, then read the list again.

No setlist slot was chosen . Fix: Pick a setlist and slot—the first empty one is pre-selected. A used slot shows what it will overwrite.

The write finished but reading the slot back did not show the new preset . Fix: Check the slot on the modeler. If the old preset is still there, install again.

Cortex Control was open and refused the write for the modeler . Fix: Quit Cortex Control, then install again.

The connection dropped part-way through . Fix: Reconnect the modeler and install again.

There is nothing to store: the preset is pushed and saved to a user slot . Fix: Open the setlist and slot you picked on the modeler—the preset is there under its new name.

Another preset is still being sent . Fix: Wait for it to finish, then send the next one.

The connection or the modeler stopped answering mid-install . Fix: Quit Cortex Control, reconnect the Quad Cortex, then try again.