However, Audition 3.0 was the end of an era. It was the last version to be sold strictly as a standalone product outside the "Creative Suite" ecosystem, and it was the last to rely heavily on the legacy codebase.
If you have obtained a legal copy (either via a reseller or Adobe’s legacy portal), here is how to install Adobe Audition CS5.5 4.0 Build 1815 on your Windows PC: However, Audition 3
: Features new native effects like DeHummer, DeEsser, and Surround Reverb, along with a history panel for easy version recovery. Multilanguage Support Multilanguage Support Enhanced native 5
Enhanced native 5.1 multichannel file support and mixing capabilities, including a dedicated Track Panner panel. Released on April 11, 2011
Enhanced tools for mixing and sweetening audio for film, video, and radio.
Adobe Audition CS5.5 (Version 4.0, Build 1815) marked a critical turning point in the software's history, as it was the first version rebuilt from the ground up to be platform-agnostic, finally bringing the professional audio toolkit to alongside Windows. Released on April 11, 2011