Seoulsonic evolved from a quarterly concert series, hosted by the DFSB Kollective in South Korea, into an international tour with the goal of assisting Korean indie bands, in particular "alt-rok" bands, to build an international audience for success beyond Hongdae. The tour started in 2011, at which time the music scene was described as follows: "the rock genre is still the obscure cousin of pop, dance and hip-hop, and other revenue streams such as product endorsements and television appearances aren’t readily available to its musicians."
Band selection
The selection process takes place in Seoul, usually at the annual Seoul International Music Fair or MU:CON SEOUL, hosted by KOCCA, which brings in international music scouts from around the world. James Minor, director of the large U.S. annual festival SXSW, has attended and handpicked his choices. After selections are made, the bands are designated for their international trips, including locations like SXSW and the Canadian Music Week for this tour; and for France’s Midem, Singapore’s Music Matters and international K-pop head-lined concerts, including K-Pop Night Out at SXSW. For the SXSW event, Bernie Cho, the president of DFSB Kollective said while selecting bands, "I look for passion. But it is a business decision. As cool as flashy K-pop may be, the cold hard facts and figures tell us the American music market is marching to different beats. We are targeting what the U.S. market is listening to."
2011, the first year
In March 2011, the first group of bands set out for SXSW in Austin, Texas. The three bands were: Vidulgi OoyoO,, Idiotape, and Galaxy Express. Prior to the tour, other South Korean bands had performed at SXSW, including YB and Seoul Electric Band in 2007, and Gong Myoung in 2009. The 2K11 "Seoulsonic North American Tour" started on March 9, 2011 at the Canadian Music Week in Toronto, Canada, and held other shows, including the Knitting Factory in New York City and the Roxy in West Hollywood, California. Apollo 18 made additional stops in Texas, Louisiana, Arkansas and Oklahoma. Also, in April 2011, a fifth band, EE ; not followed by another Korean act until 2016, when Epik High, was announced to play the festival.
Yearly line-ups 2012 - 2015
2012 - Yellow Monsters, 3rd Line Butterfly, Crying Nut
2013 - :ko:3호선 버터플라이|3rd Line Butterfly, Galaxy Express, Goonam, Lowdown 30, No Brain
2K16 scheduled to start at SXSW on March 18, 2016, at the Majestic Music Hall in Austin, with Neon Bunny, Guten Birds, Bye Bye Badman, HEO, Windy City, WYM.
In 2014, KoreAm said, "The Seoulsonic Showcase at Icenhauer’s proved the strength and diversity of Korean music at SXSW." In 2015, The Austin Chronicle said, "Seoulsonic is different from the previous night's K-pop Night Out, in the sense that it focuses on the less bubbly and less commercially viable corners of the Korean music industry." Also in 2015, KoreAm said, "several underground rock bands showed how South Korean music is more than just catchy K-pop tunes.