Eric Draper, File, Associated Press
FILE - In a March 13, 2012 file photo, Soul Train founder and Sout Train Awards producer Don Cornelius, right, appears backstage with attorney Johnny Cochran, center, at the ninth annual Soul Train Music Awards in Los Angeles. Defense attorney Carl Douglas is at left. Cornelius, creator of the long-running TV dance show "Soul Train," shot himself to death Wednesday morning, Feb. 1, 2012 at his home in Los Angeles, police said. He was 75.

LOS ANGELES — Don Cornelius, who with the creation of "Soul Train" helped break down racial barriers and broaden the reach of black culture with funky music, groovy dance steps and cutting-edge style, died early Wednesday of an apparent suicide. He was 75.

Officers responding to a report of a shooting found Cornelius at his Mulholland Drive home at around 4 a.m., police said. He was pronounced dead of a self-inflicted gunshot wound, said Los Angeles County Assistant Chief Coroner Ed Winter.

"I am shocked and deeply saddened at the sudden passing of my friend, colleague, and business partner Don Cornelius," said Quincy Jones. "Don was a visionary pioneer and a giant in our business. Before MTV there was 'Soul Train,' that will be the great legacy of Don Cornelius. His contributions to television, music and our culture as a whole will never be matched. My heart goes out to Don's family and loved ones."

The Rev. Al Sharpton said he was shocked and grief-stricken.

"I have known him since I was19 years old and James Brown had me speak on 'Soul Train,'" the civil rights activist said in a statement from New York. "He brought soul music and dance to the world in a way that it had never been shown and he was a cultural game changer on a global level."

The Rev. Jesse Jackson told KNX-Los Angeles he talked to Cornelius a few days ago and there were no signs Cornelius was upset.

"He was a transformer," Jackson said. "'Soul Train' became the outlet for African-Americans."

"Soul Train" began in 1970 as a local program in Chicago and aired nationally from 1971 to 2006, introducing television audiences to such legendary artists as Aretha Franklin, Marvin Gaye and Barry White. It became the longest-running syndicated show in TV history.

It was one of the first shows to showcase African-Americans prominently, bringing the best R&B, soul and later hip-hop acts to TV. Cornelius was the first host and executive producer.

"There was not programming that targeted any particular ethnicity," he said in 2006, then added: "I'm trying to use euphemisms here, trying to avoid saying there was no television for black folks, which they knew was for them."

"Soul Train," with its trademark opening of an animated chugging train, was not, however, an immediate success for Cornelius, an ex-disc jockey with a baritone rumble and cool manner.

Only a handful of stations initially were receptive.

"When we rolled it out, there were only eight takers," he recalled in a 2006 interview with The Associated Press. "Which was somewhere between a little disappointing and a whole lot disappointing."

The reasons he heard? "There was just, 'We don't want it. We pass,'" he said, with race going unmentioned. "No one was blatant enough to say that."

"Soul Train" arrived on the scene at a time when the U.S. was still reeling from the civil rights movement, political upheaval and cultural swings. Black faces on TV were an event, not a regular occurrence.

"Soul Train" was seen by some at first as the black "American Bandstand," the mainstay TV music show hosted by Dick Clark. While "American Bandstand" featured black artists, it was more of a showcase for white artists and very mainstream black performers.

"Soul Train" followed some of the "Bandstand" format, but it showed another side of black music and culture.

When it started, glistening Afros dominated the set, as young blacks boogied and shimmied to the music of the likes of Earth Wind & Fire and other acts perhaps less likely to get on "American Bandstand."

The show's dancers introduced Americans to new moves and fashion styles, and made the "Soul Train" dance line — where people line up while others sashay down the middle to show their moves — a cultural flashpoint.

The show's power began to wane in the 1980s and '90s. But even when Michael Jackson became the King of Pop, there was still a need to highlight the achievements of African-Americans. So Cornelius created the "Soul Train Awards," which would become a key honor for musicians.

Cornelius, who was inducted into the Broadcasting and Cable Hall of Fame in 1995 and has a star on the Hollywood Walk of Fame, said in 2006 he remained grateful to the musicians who made "Soul Train" the destination for the best and latest in black music.

"I figured as long as the music stayed hot and important and good, that there would always be a reason for 'Soul Train,'" Cornelius said.

Cornelius stepped down as "Soul Train" host in 1993. The awards returned to the air in 2009 after two-year hiatus. Last year's awards were held on Nov. 27, with Earth Wind & Fire receiving the "Legend Award."

In his later years, Cornelius had a troubled marriage. In 2009, he was sentenced to three years' probation after pleading no contest to misdemeanor spousal battery. In his divorce case that year, he also mentioned having significant health issues.

Moody reported from New York. Associated Press writers Robert Jablon, Anthony McCartney and Lynn Elber in Los Angeles contributed to this report.