上海铁路局工人沈善安最近研制了一种琵琶转调器——“活动山口”,经著名琵琶演奏家、中央音乐学院教授林石诚试奏后,效果良好,林教授高兴地说:“你解决丁我三十年来一直想解决的问题。”这一装置能使琵琶演奏转调后,仍保 Shen Anshan, a worker at Shanghai Railway Administration, recently developed a pipa transfer unit called “Activity Pass”. After being performed by renowned pipa musician and musician Lin Shicheng of the Central Conservatory of Music, the effect was good. Professor Lin said happily: The problem I’ve been trying to solve for ten years. "This device will keep the pipa playing