Fun. helped break up the sound of dance and electronic music on Top 40 radio with its edgy pop-rock grooves. Frank Ocean made a bold statement in R&B — with an announcement about his sexuality and with his critically revered, multi-genre album, “channel ORANGE.” And Mumford & Sons continued to bring its folk-rock swag and style to the Billboard charts with its sophomore album.

They all were rewarded Wednesday when The Recording Academy announced the nominees for the 2013 Grammy Awards.