A quirky, iconic, uniquely Minnesotan voice -- and creator of an astounding array of captivating, hilarious, bawdy sounds -- has fallen silent.

Tom Keith, longtime master of radio sound effects for Garrison Keillor's "A Prairie Home Companion" and cohost of "The Morning Show," died of a heart attack on Sunday at his Woodbury home, Keillor said on Monday. The St. Paul native was 64.

Keith provided sound effects and voices for the nationally syndicated show, which is produced by Minnesota Public Radio and American Public Media.

He last performed Oct. 22 at St. Paul's Fitzgerald Theater with the show's cast and guest John Lithgow, playing "a zombie and a beery Elizabethan bartender, [doing] sound effects for 'Lives of the Cowboys' ... and a wonderful and shocking sound effect of a grade-school teacher being shrunk from 6 feet to 3 inches," Keillor wrote in a statement.

The week after that show, Keith complained of shortness of breath but put off going to see a doctor, Keillor said. He collapsed at his home on Sunday evening and died in an ambulance on the way to the hospital. MPR and American Public Media CEO Jon McTaggart broke the news to staff members on Monday morning.