Audition 1.5 is 32-bit and can only address 2GB by default. Modern Windows reserves more memory, causing crashes. You need the 4GB Patch (by NTCore).
If you are installing from the original CD-ROM, the process is refreshingly simple compared to today’s constant online activations. adobe audition 1.5 setup
Cause: ASIO4ALL routing issue. Fix: Open ASIO4ALL panel while Audition is running. Ensure your output device (e.g., Speakers) has a green "play" arrow lit. If not, click to enable. Audition 1
Adobe Audition 1.5 is not freeware. You must own a valid license to install and use it. Unauthorized distribution or use of cracked versions is illegal. adobe audition 1.5 setup