Can the Avel mentioned in the prior question attend a Simchat Bet Hashoeva during Sukot when there is music being played?

Gesher Hachaim (23: 3: 7) maintains that he may attend and recite the Tehilim said, but should not dance. Others permit even dancing when there is no instrumental music being played (Chol Hamoed Keh’ 12: 42 quoting Horav Wosner Zt’l). Horav Shlomo Miller’s Shlit’a opinion is that he may be present but he should just seat apart in a corner.