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Knowledge baseQuad Cortex updatesCorOS 1.2.1 is now available
October 4, 2021

CorOS 1.2.1 is now available

CorOS 1.2.1 is now available. Download it via Settings > Device Options > Device Updates on your Quad Cortex once connected to Wi-Fi. We recommend that you create a backup before updating your firmware.



  • An issue where unexpected noise would occur after completing a Neural Capture.

  • Several USB audio performance improvements.

  • An issue where the Quad Cortex would freeze after unplugging an expression pedal when the model editor is open and the expression pedal is assigned to the bypass parameter of a bypassed Neural Capture block.

  • An issue where MIDI control of expression assignments would not work without a cable plugged in an expression pedal jack.

  • An issue where the tuner would respond slowly when used immediately after booting before adjusting the base frequency.

  • An issue where factory microphone names are not listed in the IR dropdown menu after loading custom IRs and setting parameter defaults for the cab block.

  • An issue where the "Unassign from Scene" button would not function correctly when opening the model editor for a device from The Grid while the model editor is already open.