If you are using a 32-bit operating system, the last compatible version was Adobe Audition CS6 . No official "CC 2015" version was ever released for 32-bit systems.
: Users with lower specifications (like 4GB RAM) often experience "crackling" or lagging in Audition CC 2015 because the software consumes significant system resources. Legitimate Ways to Access Audition Adobe Audition CC 2015 32Bit Crack