Outstanding! Cheaper and better than new headphones.

I dont know how they do it (and neither does anyone else), but Rolls Royce, BMW, and Bentley use Dirac technology in their vehicles and they cant all be wrong. This app was specifically designed to improve the audio qualities of the ubiquitous basic iPhone/iPod/iPad Earphones and Earbuds based upon extensive analysis of their inherent designs. Mission accomplished. Youll be astounded by the improvements in frequency response and spatial imaging.

Truly astounding, and HIGHLY recommended.

ThinkDefyUnite about Dirac HD Player