Les Paul, the virtuoso guitarist and inventor whose solid-body electric guitar and recording studio innovations changed the course of 20th-century popular music, died Thursday in White Plains. He was 94.

The cause was complications of pneumonia, the Gibson Guitar Corporation announced.

Mr. Paul was a remarkable musician as well as a tireless tinkerer. He played guitar with leading prewar jazz and pop musicians from Louis Armstrong to Bing Crosby. In the 1930s he began experimenting with guitar amplification, and by 1941 he had built what was probably the first solid-body electric guitar, although there are other claimants. With his electric guitar and the vocals of his wife, Mary Ford, he used overdubbing, multitrack recording and new electronic effects to create a string of hits in the 1950s.

Mr. Paul’s style encompassed the twang of country music, the harmonic richness of jazz and, later, the bite of rock ’n’ roll. For all his technological impact, though, he remained a down-home performer whose main goal, he often said, was to make people happy.

Mr. Paul, whose original name was Lester William Polfus, was born on June 9, 1915, in Waukesha, Wis. His childhood piano teacher wrote to his mother, “Your boy, Lester, will never learn music.” But he picked up harmonica, guitar and banjo by the time he was a teenager and started playing with country bands in the Midwest. In Chicago he performed for radio broadcasts on WLS and led the house band at WJJD; he billed himself as the Wizard of Waukesha, Hot Rod Red and Rhubarb Red.

His interest in gadgets came early. At 10 years old he devised a harmonica holder from a coat hanger. Soon afterward he made his first amplified guitar by opening the back of a Sears acoustic model and inserting, behind the strings, the pickup from a dismantled Victrola. With the record player on, the acoustic guitar became an electric one. Later, he built his own pickup from ham radio earphone parts and assembled a recording machine from a Cadillac flywheel and the belt from a dentist’s drill.  Full Article...