I like to listen to Internet radio stations and sometimes stumble across some gems; this youth choir was outstanding. Their version of “Alleluia” was crisp and pure, and the young people the hosts interviewed had such inspiring stories. I’ve sung that piece recently, this performance totally rocks. This week, from the Bethel African Methodist Episcopal Church in Jamaica Plain, Massachusetts, From the Top celebrates the legacy of Dr. Martin Luther King Jr. through the eyes of today’s teenagers. You’ll hear the superb Boston Children’s Chorus sing several inspiring pieces and meet a 17-year-old bassoonist whose path parallels Coretta Scott King’s…