The first thing to understand about Audition 3.0 is its architecture. It was built for a different era—a 32-bit ecosystem. When you run the "Portable" version on a Windows 10 64-bit system, you are technically running it in a compatibility layer (WOW64).
While the portable version strips away the installer bloat, it cannot strip away the architecture. adobe audition 3.0 portable windows 10 64 bits
If you have a legitimate copy installed on an old machine, here is the advanced method to make it portable for Windows 10 64-bit. The first thing to understand about Audition 3
Perhaps the deepest conflict in using this version today is the plugin architecture. Audition 3.0 was beloved for its VST support. However, the audio production world has largely moved to 64-bit VST3 plugins. If you try to load a modern Serum or FabFilter plugin into Audition 3.0 Portable, it will fail. You are restricted to the dusty libraries of 32-bit VSTs. While the portable version strips away the installer
To make this work, power users often employ "bridging" software (like jBridge) to force 64-bit plugins into the 32-bit host. It is a Frankenstein setup—a modern engine duct-taped to a vintage chassis—but when it works, it reminds us that the core math of audio processing hasn't changed much.
Audition 3.0 only supports 32-bit VST2 plugins. Do not attempt to use 64-bit VST3 plugins. Use a bridge like jBridge if you must host 64-bit plugins, but expect latency. Popular free 32-bit VSTs that work flawlessly: