Worldwide digital music sales increased to $790 million in 1H05, up 259 percent from $220 million in the same period last year, driven mostly by sales in the U.S., the U.K., Japan, Germany and France, according to the International Federation of the Phonographic Industry, reports InternetNews. First-half digital music sales constituted 6 percent of overall music sales, up from 1.6 percent a year ago.