You're looking to download Adobe Audition 1.5 for PC. Here's what I found:
through Creative Cloud, users looking for the specific 1.5 version generally find it through digital preservation sites: Internet Archive Download Adobe Audition 1.5 For Pc
If you search for "download Adobe Audition 1.5 for PC" today, almost all results will fall into three categories: You're looking to download Adobe Audition 1