LONDON (AP) — Samuel Smith spent years writing songs with a guitar in his hands. Now, the London-based singer-songwriter is using artificial intelligence tools to help him continue making Americana music after Parkinson’s disease largely took away his ability to play guitar. Smith, who was diagnosed with the progressive neurological disorder in 2020, recently released his second album, “The Art of Letting Go.” For one of the eight tracks, an instrumental piece titled “Horizon,” he relied on