Peer was born May 22, 1892, in Independence, MO, where his father's furniture business also sold phonographs and gramophones; as a teen he worked weekends in the store's stockroom, and in short time was responsible for ordering new machines and records. During high school, Peer spent his summers working at the Columbia Phonograph Company's Kansas City offices, and upon graduating he joined the company full-time, eventually earning a transfer to their Chicago headquarters. After serving in the U.S. Merchant Marine during World War I, Peer returned to Chicago in 1919; his boss, W.S. Fuhri, moved to the rival General Phonograph Company, assigning him to the firm's fledgling OKeh label.

In addition to the standard ballads and light classical recordings that dominated the record industry during the early 20th century, OKeh also cut blues and jazz discs, and on August 10, 1920, Peer and musical supervisor Fred Hager oversaw the creation of Mamie Smith's "Crazy Blues," widely considered the first record geared directly to African-American audiences. It sold well in excess of a million copies, proving the limitless commercial potential for what Peer unceremoniously dubbed "race" records. By the following summer he was positioned as recording director of OKeh's new 8000 "race" series, transforming the stumbling label into a force rivaling market leaders Victor and Columbia.

He also exhibited a uncommon knack for discovering new talent, signing jazz pianist Fats Waller and blues singer Sara Martin and her sometimes accompanist Sylvester Weaver, reportedly the first guitarist to back a blues vocalist on record. In March 1923, Peer was visited by one William Henry Whittier, who boasted he was the "world's greatest harmonica player" -- a handful of demonstration recordings were made, and by year's end OKeh was in what Peer dubbed the "hillbilly" business with the release of Fiddlin' John Carson's "The Little Old Cabin in the Lane." Regarded as the first official country music recording, Carson's debut sold over 500,000 copies nationwide.

In his continuing effort to discover new acts and reach untapped markets, Peer began traveling the U.S. with portable recording equipment designed by OKeh technician Charles Hibbard. During the course of 1923 he visited Atlanta, Chicago, and St. Louis, along the way recording previously unknown acts including future jazz legends Louis Armstrong, King Oliver, and Bennie Moten; blues singer Sippie Wallace; and Ernest V. "Pop" Stoneman, whose 1924 hit "The Titanic" inaugurated a country staple, the "event" song. Over the next two years Peer expanded his travels to include Cincinnati, Dallas, Cleveland, Detroit, and New Orleans -- he advertised his arrival in local newspapers and paid each artist $25 per selection, while securing copyright protection for original songs recorded on his watch via the 1909 U.S. Copyright Act. Peer was the first label exec to encourage his recording artists to write their own original songs and avoid copyrighted material, pocketing most of the royalties himself -- the practice proved so lucrative that when he left OKeh to join the Victor Talking Machine Company, he accepted a nominal salary of just one dollar a year, instead assuming control of all copyrighted work created under his supervision and administering his publishing portfolio via his Southern Music firm.

With Victor's new "Orthophonic" recording equipment in tow, Peer returned to Atlanta in early 1927, followed by stops in Memphis and New Orleans. That summer, he again hit the road, this time departing for Bristol, TN, a small farming town on the Virginia border recommended to him by Stoneman, who on July 25 was the first act Peer recorded. Artist turnout was tepid, however, until a newspaper profile of Stoneman recounted the $3,600 in royalty checks he received in 1926 and the $100 a day he was earning while cutting new music in Bristol -- soon Peer was flooded with auditions and making records well into the night, in all documenting 76 songs by 19 different performers. They included the Carter Family -- songwriter A.P., his singer wife Sara, and guitarist sister-in-law Maybelle, who would emerge as the "first family of country music" -- as well as Jimmie Rodgers, "the Singing Brakeman" who was to become the first hillbilly superstar. Peer's Bristol sessions are rightly considered the big bang of country music -- the Carters and Rodgers catalyzed rural American music's transformation into universal art, not to mention an increasingly powerful commercial force. Peer immediately grasped their brilliance, managing the careers of both acts and carefully selecting the songs they recorded.

After leaving Bristol, Peer migrated to Savannah, GA, where he produced Blue Steele's national waltz hit "Girl of My Dreams"; over the course of the year to follow, he also cut sessions with blues legends Blind Willie McTell, Furry Lewis, Will Shade, Ishman Bracey, and Jim Jackson. Back in New York, Peer also produced sessions spotlighting Trinidad-born Donald Heywood in an effort to reach the growing number of Caribbean immigrants entering the U.S., and in 1929 he even requested white clarinetist Sidney Arodin sit in with the black Jones & Collins Astoria Hot Eight, heralding one of the first racially integrated sessions ever documented.

By this time, Peer was also courting the mainstream pop market with future perennials like Hoagy Carmichael's "Georgia on My Mind," and he also moved into Hollywood, enlisting composer Leroy Shield to write soundtracks for film comedy producer Hal Roach. But the Depression threatened to change everything -- rival labels including Columbia went bankrupt, and although the Carter Family's melancholy, deeply felt Appalachian ballads continued to sell, A.P. and Sara Carter's marriage teetered on the brink of collapse. Jimmie Rodgers' May 26, 1933, death from tuberculosis clearly heralded the end of an era.

After securing sole control of his copyrights, Peer exited Victor to concentrate on the international music market, establishing Southern Music offices in London, Paris, Rome, Madrid, Mexico City, and Havana. While the outbreak of World War II threatened to curtail Peer's global ambitions, at home he dealt with the American Society of Composers, Authors, and Publishers' 1941 decision to pull its copyrights from radio in a royalties dispute. Southern negotiated with ASCAP's rival Broadcast Music Inc. to license the adapted Latin American songs Peer had collected for years, giving traditional standards like "Perfidia," "Brazil," and "Besame Mucho" new life on U.S. radio, and though ASCAP's radio boycott lasted only a few weeks, the opening was enough to establish BMI as a true contender to the publishing throne.

Following the war, Peer changed course again, signing contemporary classical composers like Charles Ives, Jean Sibelius, and Virgil Thomson, and Southern Music's catalog only grew in value with the advent of rock & roll, as acts including Elvis Presley, Buddy Holly, the Platters, and the Rolling Stones made its old songs new all over again. But by this time Peer devoted much of his time and energy to horticulture, becoming director of the American Horticultural Society in 1959. He died in Los Angeles on January 19, 1960.