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Knowledge baseQuad Cortex updatesCorOS 2.0.1 is now available
March 7, 2023

CorOS 2.0.1 is now available

CorOS 2.0.1 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.


  • The “Sort by” button has been removed from the Recent folder in the Directory.


  • An issue where the Jewel Comp would invert phase.

  • An issue where the output volume would occasionally ramp up when loading a Preset that has a Legendary 87 compressor placed before a chorus.

  • An issue where output signal from the active path was muted when bypassing a delay block with the mix parameter at 100% and the trails parameter set to off.

  • An issue where the MX Flanger’s LFO depth was not correctly set when the sync was enabled and the BPM was out of bounds.

  • An issue where an incorrect Preset name was displayed on The Grid when entering bank selection mode.

  • An issue where the blocks in Gig View would not enlarge in Preset Mode when tapping a footswitch a second time.

  • An issue where some or all Factory Captures would be missing after updating to CorOS 2.0.0.

  • A crash that would occur after saving and loading a Preset when 129 or more Presets were saved in the My Presets Setlist.

  • A crash that would occur when updating the gain reduction meter.

  • A crash that would occur after tapping a Preset in the Directory that had no devices.

  • A crash that would occur when saving an auditioned Preset when all Setlists were full.

  • A crash that would occur when entering the Backups menu while sending MIDI Clock to the QC.

  • A crash that would occur when attempting to paste a Preset that was cut or copied from a deleted Setlist.

  • A few minor performance and UI fixes.