This Is the Stunning Audio of an Unintelligible Michael Jackson Going Viral

The involuntary manslaughter trial against Michael Jackson's doctor, Dr. Conrad Murray, began in Los Angeles on Tuesday. And one of the day's most stunning moments came when Deputy District Attorney David Walgren played a recording of a conversation between Jackson and Murray in which the singer detailed what he wanted out of the shows. Jackson's voice, though recognizable, was slow and slurred.

"We have to be phenomenal," Jackson is heard saying in the recording, which investigators gleaned from Murray's phone after the singer's death. "When people leave this show, when people leave my show, I want them to say, `I've never seen nothing like this in my life. Go. Go. I've never seen nothing like this. Go. It's amazing. He's the greatest entertainer in the world.'"

Murray's lead defense attorney Ed Chernoff also noted Jackson's desire for success, but that the singer's ambition ultimately prompted him to give himself a fatal dose of medication.

He said Murray had been trying to wean Jackson off propofol, but that the entertainer kept requesting it on the day he died to help him sleep.

"Michael Jackson started begging," Chernoff said. "When Michael Jackson told Dr. Murray, `I have to sleep. They will cancel my performance,' he meant it."

He told jurors that Jackson swallowed enough of the sedative lorazepam to put six people to sleep before ingesting propofol. The combination, which Chernoff called a "perfect storm" of medications, killed Jackson so quickly that he didn't even have chance to close his eyes.

The Associated Press contributed to this report.