You can carry your entire workstation on a thumb drive.
Adobe Audition 1.5 is "abandonware," but it is technically still Adobe's intellectual property. Portable versions are often unofficial "repacks" created by third parties. Modern Alternatives to Adobe Audition 1.5 adobe audition 15 portable
Adobe Audition 1.5 Portable remains a nostalgic and functional choice for those with older hardware or a preference for the "Cool Edit" style workflow. However, due to security risks and the lack of support for modern audio drivers (ASIO), most users are better off transitioning to Audacity or the current Adobe Creative Cloud suite. You can carry your entire workstation on a thumb drive
If you decide to hunt for this classic version, ensure you are running it in a secure environment and keep your expectations realistic regarding its performance on modern versions of Windows. Modern Alternatives to Adobe Audition 1
It doesn't clutter the Windows registry.