Chen worked from photographs and drawings to calculate the dimensions for his instruments, but the finished prototypes sounded wrong and could not be used to play a tune. He had to fall back on his experience as an instrument maker to modify them into something playable.
陳焜晉以圖卷及照片為範本，按圖索驥後量出據以製作的樂器尺寸，但是當樂器完成，卻發現音律不對，奏不出曲調，於是又以過去製造樂器的經驗，將它修整成可以演奏的形式。