Radio broadcasters, once a vital part of American culture, have been shedding listeners for decades — the mass transition to digital media has been particularly brutal for the AM band, where listenership against FM audiences is at a record low of 15 percent. FCC Commissioner Ajit Pai grew up listening to high school basketball games on KLKC 1540AM in his native Parsons, Indiana. AM’s low fidelity makes it relatively unsuitable for music compared to FM; “I’m often asked why we should care about the future of AM radio,” Pai said in September at a meeting with the National Association of Broadcasters.