One moment — BBC presenter Zane Lowe's on-air dismissal of Beyoncé's Glastonbury performance — has haunted Stephen Graham for months. To him it shows up layers of predjudices about music still rife in our society.

Kevin Stevens travels to Ethiopia to find a tradition that has flourished against the odds.

Alice Echols tells the forgotten story of the daring, cross-racial experimentation that happened across rock, funk and disco during the 1970s.