{"id":1788946,"date":"2026-01-26T18:50:53","date_gmt":"2026-01-26T23:50:53","guid":{"rendered":"https:\/\/www.sweetwater.com\/sweetcare\/?post_type=articles&#038;p=1788946"},"modified":"2026-01-27T09:17:28","modified_gmt":"2026-01-27T14:17:28","slug":"neural-dsp-quad-cortex-coros-4-0-0-firmware-update","status":"publish","type":"articles","link":"https:\/\/www.sweetwater.com\/sweetcare\/articles\/neural-dsp-quad-cortex-coros-4-0-0-firmware-update\/","title":{"rendered":"Neural DSP Quad Cortex CorOS 4.0.0 Firmware Update"},"content":{"rendered":"\n<p>Neural DSP released Quad Cortex CorOS 4.0.0 on January 21, 2026, with support for the <a href=\"https:\/\/www.sweetwater.com\/store\/detail\/QuadCortex--neural-dsp-quad-cortex-quad-core-digital-effects-modeler-profiler-floorboard\" target=\"_blank\" rel=\"noreferrer noopener\">Quad Cortex<\/a> and the new <a href=\"https:\/\/www.sweetwater.com\/store\/detail\/QCMini--neural-dsp-quad-cortex-mini-modeling-and-effects-processor-sweetwater-exclusive\" target=\"_blank\" rel=\"noreferrer noopener\">Quad Cortex mini<\/a>. The two devices run the same version of CorOS and the Cortex Control app for macOS and Windows. Sweetwater recommends that all Quad Cortex users install both CorOS 4.0.0 and Cortex Control 4.0.0 to take full advantage of the new features and improvements.<\/p>\n\n\n\n<ul><li><strong><a href=\"#New-Features-in-Quad-Cortex-CorOS-4.0.0\">New Features in Quad Cortex CorOS 4.0.0<\/a><\/strong><\/li><li><strong><a href=\"#Back-Up-Your-Data\">Back Up Your Data<\/a><\/strong><\/li><li><strong><a href=\"#Update-the-Firmware\">Update the Firmware<\/a><\/strong><\/li><li><strong><a href=\"#Verify-Your-Presets-and-Restore-from-Backup\">Verify Your Presets and Restore from Backup<\/a><\/strong><\/li><li><a href=\"#Download-the-Newest-Version-of-the-Cortex-Control-App\"><strong>Download the Newest Version of the Cortex Control App<\/strong><\/a><\/li><\/ul>\n\n\n\n<h2 id=\"New-Features-in-Quad-Cortex-CorOS-4.0.0\">New Features in Quad Cortex CorOS 4.0.0<\/h2>\n\n\n\n<p>The same CorOS runs on Quad Cortex and Quad Cortex mini. The two units have essentially the same features, but a slightly different user interface.<\/p>\n\n\n\n<p>CorOS and the Cortex Control app now share the same version number.<\/p>\n\n\n\n<h3>New Features<\/h3>\n\n\n\n<ul><li><strong>Custom Device Name:<\/strong> Assign a custom name to your Quad Cortex, so it\u2019s easier to manage multiple devices in the Cortex Control app.<\/li><li><strong>Hold Timing Menu:<\/strong> Define how long a footswitch must be held to trigger its assigned action, from 500 ms to 1 second.<\/li><li><strong>Gig View Footswitch Access:<\/strong> You can enter Gig View using footswitches: on Quad Cortex, press and hold Bank Down + Tempo. On Quad Cortex mini, press and hold Footswitch A.<\/li><li><strong>Scenes Dropdown:<\/strong> Easily open a drop-down menu to show all available Scenes in the current Preset.<\/li><li><strong>Booting tooltips:<\/strong> While your device is booting up, helpful tips and information appear onscreen.<\/li><li><strong>Gig View Opposite Page Preview:<\/strong> On Quad Cortex mini, in Scene and Stomp modes, the eight entries are divided among two Pages. With Page Preview, while viewing one Page, you see descriptions of the four cards on the other page.<\/li><\/ul>\n\n\n\n<h3>New virtual devices<\/h3>\n\n\n\n<ul><li>Three new reverbs, Nordic Concert Hall, Studio Plate 70, and Blossom<\/li><li>One new utility, the Phase Doctor phase alignment tool<\/li><\/ul>\n\n\n\n<h3>Fixed<\/h3>\n\n\n\n<p>There are numerous bug fixes and improvements in both CorOS and the Cortex Control app.<\/p>\n\n\n\n<p>For the full list of new features and improvements,&nbsp;here\u2019s <a href=\"https:\/\/neuraldsp.com\/quad-cortex-updates\/coros-4-0-0-and-cortex-control-4-0-0-are-now-available\" target=\"_blank\" rel=\"noreferrer noopener\">Neural DSP\u2019s CorOS 4.0.0 announcement<\/a>.<\/p>\n\n\n\n<p>Be sure to reference the newest, updated&nbsp;<a href=\"https:\/\/neuraldsp.com\/manual\/quad-cortex\" target=\"_blank\" rel=\"noreferrer noopener\">Quad Cortex User Manual<\/a> online.<\/p>\n\n\n\n<h2 id=\"Back-Up-Your-Data\">Back Up Your Data<\/h2>\n\n\n\n<h3 id=\"Connect-your-Quad-Cortex-unit-to-Wi-Fi\">Connect your Quad Cortex unit to Wi-Fi<\/h3>\n\n\n\n<ol type=\"1\"><li>Click the <strong>three dots<\/strong> in the top-right corner of any Preset screen.<\/li><li>In the pop-up menu, use your finger to scroll down to <strong>Settings<\/strong>.<\/li><li>Select <strong>Connection<\/strong> from the navigation bar. Connect to a 2.4GHz Wi-Fi network by entering the passcode.<\/li><li>Verify that there\u2019s a check mark next to the network, to confirm your connection.<\/li><\/ol>\n\n\n\n<h3>Log in to Your Quad Cortex Account<\/h3>\n\n\n\n<p>Navigate to <strong>System &gt; Account<\/strong>.<\/p>\n\n\n\n<p>Touch <strong>Login<\/strong>. Enter your Neural DSP account email and password.<\/p>\n\n\n\n<p>Touch the blue button to link to your account. It may take several minutes to connect.<\/p>\n\n\n\n<h3>Back Up Your Data, Captures, and Presets to the Cortex Cloud<\/h3>\n\n\n\n<p class=\"has-background\" style=\"background-color:#fff5c7\"><strong>IMPORTANT:<\/strong>&nbsp;Don\u2019t update your firmware to a new version of CorOS until you have backed up your data. If anything goes wrong in the update process, then you can restore everything using the backup.<\/p>\n\n\n\n<ol type=\"1\"><li>Go to <strong>Settings &gt; Account &gt; Backups<\/strong>.<\/li><li>Touch <strong>New Cloud Backup<\/strong>.<\/li><li>Name your backup and wait for verification. The filename will appear once it is complete.<\/li><\/ol>\n\n\n\n<p>If you encounter a backup error message, double-check your Wi-Fi connection, and move your unit closer to your Wi-Fi access point.<\/p>\n\n\n\n<h2 id=\"Update-the-Firmware\">Update the Firmware<\/h2>\n\n\n\n<h3>Update Procedure<\/h3>\n\n\n\n<p class=\"has-background\" style=\"background-color:#fff5c7\"><strong>IMPORTANT:<\/strong> Do not shut down your Quad Cortex or interrupt its access to Wi-Fi during the firmware update. The entire process may take as long as 35 minutes. If you interrupt the process, issues may arise and you will have to start over.<\/p>\n\n\n\n<p>The update is carried out on your Quad Cortex over Wi-Fi. If you are running the Cortex Control app on your computer, quit the app before you begin the update.<\/p>\n\n\n\n<p>Make sure you are in a location with a strong, stable Wi-Fi connection.<\/p>\n\n\n\n<ol type=\"1\"><li>Go to <strong>Settings &gt; System &gt; Updates<\/strong>.<\/li><li>Touch <strong>Check for Updates<\/strong>.<\/li><li>You should see a notification that the new version of CorOS is ready to install. Accept the update.<\/li><li>A \u201cDownloading Latest Update\u201d message and a progress bar should appear.<\/li><\/ol>\n\n\n\n<p>Wait patiently as the unit may reboot more than once.<\/p>\n\n\n\n<h3>Verify the Firmware Update<\/h3>\n\n\n\n<ul><li>Navigate to <strong>Settings &gt; System &gt; Updates<\/strong>. You\u2019ll see the current CorOS version displayed.<\/li><\/ul>\n\n\n\n<p>If the new version number isn\u2019t displayed, then verify that you are connected to Wi-Fi and logged in to your Neural DSP account. Run the update procedure again.<\/p>\n\n\n\n<h2 id=\"Verify-Your-Presets-and-Restore-from-Backup\">Verify Your Presets and Restore from Backup<\/h2>\n\n\n\n<p>Back at the Home screen, cycle through the Scene, Stomp and Preset modes to ensure that your presets are all in place. <\/p>\n\n\n\n<p>If everything looks okay, you can go to the next section and update the Cortex Control app on your computer.<\/p>\n\n\n\n<p>If anything on your Quad Cortex looks amiss, go to <strong>Settings &gt; Account &gt; Backups<\/strong>, select your saved backup, and touch <strong>Download<\/strong>.<\/p>\n\n\n\n<p>A \u201cBackup ready to install\u201d prompt will appear. Touch <strong>Proceed<\/strong>, then wait while the data is restored.<\/p>\n\n\n\n<h2 id=\"Download-the-Newest-Version-of-the-Cortex-Control-App\">Download the Newest Version of the Cortex Control App<\/h2>\n\n\n\n<p>CorOS 4.0.0 requires the matching version of the Cortex Control app.<\/p>\n\n\n\n<p>On your computer, go to the <a href=\"https:\/\/neuraldsp.com\/downloads\" target=\"_blank\" rel=\"noreferrer noopener\">Neural DSP Downloads page<\/a>.<\/p>\n\n\n\n<p>Under <strong>Cortex Control &gt; Installers<\/strong>, download the newest version for your operating system, Windows or macOS.<\/p>\n\n\n\n<p>Go to your Downloads folder, run the installer, and follow the prompts.<\/p>\n\n\n\n<p>If you are on Windows, you must also install the Quad Cortex ASIO driver before using Cortex Control. You can find it under \u201cQuad Cortex\u201d on the Neural DSP Downloads page. <\/p>\n\n\n\n<p>Cortex Control and its newest features are explained in the <a href=\"https:\/\/neuraldsp.com\/manual\/quad-cortex#Cortex-Control-App\" target=\"_blank\" rel=\"noreferrer noopener\">owner\u2019s manual, here<\/a>.<\/p>\n","protected":false},"featured_media":1788949,"template":"","categories":[523090,2,142726,523086],"tags":[555542,72562,534509,456262,456263,606551],"storecat":[],"itemids":[598856,282923,585030],"manufacturers":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v17.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<meta name=\"description\" content=\"Neural Quad Cortex CorOS 4.4.0 adds new features and supports Quad Cortex Mini. 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