Soundboard ribs are of spruce and are fully let-in to a notched liner (uprights) and the rim (grands) to support the sou音板肋木也由云杉制成，完全嵌入锯齿状衬垫（直身钢琴）或琴身（三角钢琴），用以支撑音板的冠状顶部和稳定钢琴音质。
Specially designed closing rims make the upright soundboard irregular in shape (more like a grand), and improve its acou特别设计的外壳使直身钢琴的音板更像三角钢琴，更能提升听觉享受。