Breakaway Audio - Enhancer 1.44 Best Full |link|

Not for everyone. Version 1.44’s algorithm introduces subtle harmonic distortion that many listeners find "musical." Newer versions are cleaner but sterile.

For those using budget hardware, it provides "magical" improvements to bass and clarity, making cheap speakers sound significantly better. Breakaway Audio Enhancer 1.44 BEST Full

Re-run the installer in Repair Mode. Windows sometimes overwrites the audio stack with its own drivers. Not for everyone