Fig. 1 The Harman Headphone Virtualizer App allows listeners to make double-blind comparisons of different headphones through a high-quality replicator headphone. The app has two listening modes: a sighted mode (shown) and a blind mode (not shown) where listeners are not biased by non-auditory factors (brand, price, celebrity endorsement,etc). Clicking on the picture will show a larger version.| Audio Musings by Sean Olive