Wilson "was an amazing musician and friend," the pal added. "He would do anything for anybody. And for someone who went through some personal hardships, including his mother dying, he was a really positive, upbeat guy."

The half-hour service ended with a recording of Wilson playing "Amazing Grace" on the clarinet.

"He was a horn player in the U-of-A marching band," Wilson's friend recalled. "It was really nice to hear something again that he loved to do...He played ['Amazing Grace'] at his mom's funeral six years ago. It was really nice to hear him [at the memorial] play a song that meant so much to him. If you didn't cry yet, you were definitely crying by then. It was pretty moving."