To create a Neural Capture you need to be able to mic up a cabinet or use an amplifier with a load box or D.I. Out.

Connecting the speaker output from a tube amplifier to the Quad Cortex could damage both units. Ensure you are using a D.I. Out and your amplifier is still connected to a cabinet or reactive load box.

Start by taping the Main Menu at the top-right corner of The Grid, then tap “New Neural Capture”.

Connection Diagram

  • Plug your instrument into Return 1. For the best results, disconnect any devices from Send 1, Send 2, and Return 2

  • Connect your headphones and/or use your XLR outputs for monitoring.

  • Connect Capture Out to the input of the device being captured input.

  • Position your microphone in front of the cabinet and connect it to Input 1.

No special type of microphone is needed. Note that the Neural Capture is a global snapshot of a real device setup and that includes the microphone used and its placement as well.

You can also Capture isolated overdrive/distortion pedals without using an amplifier. Connect them to Quad Cortex Input 1 using a TS cable.

If you have an amplifier that has a D.I. Out, you can opt to use that instead of a microphone for capturing the amplifier without the cabinet. Connecting the speaker output from a tube amplifier to the Quad Cortex could damage both units. Ensure you are using a D.I. Out and your amplifier is still connected to a cabinet or reactive load box.

  • Once everything is connected correctly, tap CONFIRM to start the Capture process.

 

Capture Process

Set your microphone position and tweak the device parameters to your liking. Capture process Here you can modify the levels in order to get a better performance during the Capture process.

  • INST 1 LVL [dB] KNOB: Sets the input gain of the instrument signal.
  • IN 1 LVL [dB] KNOB: Sets the input gain of the microphone signal.
  • GROUND LIFT SWITCH: Enable them in order to reduce or eliminate the ground-related noise arising from ground loops in audio cables or other sources.
  • TYPE SWITCH: Toggles between “Mic” and “Instrument” inputs. Use “Instrument” if the device being captured is connected to Quad Cortex with a TS cable. Use “Mic” if the device being captured is connected to Quad Cortex with an XLR cable.
  • PHANTOM SWITCH: Enables the Phantom Power (48v).
  • INST 1 LVL METER: Input signal meter.
  • IN 1 LEVEL METER: Input signal meter.
  • HEADPHONES LEVEL KNOB: Sets the output level of the headphones.
  • AUTO-SET BUTTON: Sets the IN 1 level automatically. Play your instrument until the IN 1 knob stops moving.

Tap the [Start Capture] button to begin. The progress window will show the following steps:

  • Calibration: Measuring latency of the connected device. In the case of a digital device, keep latency as low as possible.
  • Recording Signals: Recording signals that will be used for modeling.
  • Sanity Check & Training: The core of Neural Capture. Training a neural network to emulate the sound of your device. If the Sanity Check fails, use the AUTO-SET feature to get optimal input levels.

 

Testing a Neural Capture

After the Capture process, your Neural Capture will be ready for testing.

  • CORTEX & REFERENCE BUTTONS: Tap them to toggle between the original device signal and the Neural Capture. Footswitch A can be pressed or turned to switch between the two.
  • HEADPHONES KNOB: Sets the output level of Quad Cortex in the mix (Rotary footswitch B assigned automatically).
  • START FROM SCRATCH BUTTON: Start the Neural Capture process again.

 

Saving a Neural Capture

 

 

 

Tap the SAVE button to save your Neural Capture.

In the save menu, you can name your Neural Capture as well as assign it tags.

 

Using a Neural Capture

Captures can be used by loading a Neural Capture block on The Grid. Tap an empty space on The Grid and select “Neural Capture” in the Device Category list.

This will open the Virtual Device Library, where you can navigate through the different Neural Capture folders, “My Captures”, “Factory Captures 1”, and “Factory Captures 2”. Each folder has 32 banks of 8 Capture slots. Tap a Neural Capture in a bank to add it to The Grid.

After selecting a Neural Capture, it will be placed as a device block on The Grid. Tap on it to access its parameters.

  • GAIN [dB]: Determines the gain in the preamp section of the model.
  • BASS [dB]: Affects the low-end of the signal.
  • MID [dB]: Affects the mid-range of the signal.
  • TREBLE [dB]: Affects the high-end of the signal.
  • VOLUME [dB]: Determines the output level of the model.