I notice you're asking for an "Autotune VST" for — that's a very old version (released around 2004).
If you prefer not to use external plugins, Audition 1.5 has built-in features for pitch correction:
Here is everything you need to know about finding, installing, and using Autotune VSTs within Adobe Audition 1.5. Understanding the Compatibility Limits
Because Audition 1.5 is a 32-bit application, it can only run plugins. You cannot use modern 64-bit or VST3 plugins without a bridging tool. Autotune Vst For Adobe Audition 1.5
However, because it was built over two decades ago, getting modern pitch correction plugins to work inside it requires specific workarounds. This comprehensive guide will show you how to find, install, and optimize Auto-Tune VST effects within Adobe Audition 1.5. Understanding the Compatibility Challenge
Select (without changing duration). Note: This is manual, slow, and not suitable for fast, modern pop-style autotune.
Because of the 32-bit constraint, many modern 64-bit plugins will not work. These free options are known to work with older Windows systems: I notice you're asking for an "Autotune VST"
Adobe Audition 1.5 (released 2004) predates modern VST implementations and has limited native VST support. Users seeking Auto-Tune-style pitch correction for Audition 1.5 should expect compatibility and stability challenges; modern alternatives or upgrading Audition is strongly recommended.
These older versions were built during the era of Audition 1.5.
Click on an empty FX slot in your multitrack session, navigate to , and select your autotune plugin from the dropdown menu. Troubleshooting Common Issues The Plugin Isn't Showing Up The Cause: You likely downloaded a 64-bit version. You cannot use modern 64-bit or VST3 plugins
Open the plugin interface. Choose the root key (e.g., C) and scale type (e.g., Minor) matching your backing track. Adjust the Speed:
: Place your .dll VST files in the C:\Program Files\Adobe\Audition 1.5\Plug-ins directory.