
February 3, 2022
CorOS 1.3.1 is now available
CorOS 1.3.1 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.
Changelog
Fixed
An issue in which a crash occurs when entering the I/O Settings menu.
An issue in which the output signal is muted after 1 minute if a Plate Reverb’s Mod Depth parameter is set to 100%.
An issue in which the UI freezes after moving or deleting a bypassed block that has the bypass parameter assigned to an expression pedal.


January 21, 2026
CorOS 4.0.0 and Cortex Control 4.0.0 are now available

December 15, 2025