FxSound Enhancer Premium 13.028 Portable is a modified, standalone version of the popular audio enhancement software designed to boost your PC's sound quality without requiring a full installation.

This indicates that the software has been modified to run without an installer. You can keep it on a USB thumb drive and run it on any Windows PC.

To understand this specific keyword, it helps to break down the technical terms used in the file name:

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Increases the overall perceived volume without causing audio distortion or clipping.

Rebuilds lost harmonics in compressed audio files.