Musician Lou Reed, for decades a rock icon, died Sunday at age 71. In 2006, he took a picture of an ad for his own photo exhibit in Naples. AFP/AFP/Getty Images hide caption

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Cookie Marenco records musicians on a small remote recording console live at the California Audio Show in August. She'll demonstrate the quality of DSD to the audience by playing back her recording. How close will it sound to the live performance? Very close, according to people present. Cindy Carpien hide caption

itoggle caption Cindy Carpien

Members of the Mormon Tabernacle Choir raise their voices in unison — and perhaps unify their heart rates, too. George Frey/Getty Images hide caption

itoggle caption George Frey/Getty Images

The video for Chinese artist Ai Weiwei's newly released song starts by re-creating the conditions of his captivity during the 81 days he was held in police detention in 2011, and later dissolves into a dystopian nightmare. Courtesy Ai Weiwei hide caption

itoggle caption Courtesy Ai Weiwei

Solomon "Sully" Omar performs with the Afghan metal band District Unknown at the third annual Sound Central Festival in Kabul earlier this month. Courtesy of Ellie Kealey hide caption

itoggle caption Courtesy of Ellie Kealey

The Songza app lets music lovers build playlists for almost any mood or situation, from "Unwinding After a Long Day" to "Cooking" or "Eating Dinner." iStockphoto.com hide caption

itoggle caption iStockphoto.com