Gong Sinking in Javanese Gamelan Forging
铜锣下凹：爪哇加美兰的整片沉膛
标签：铜锣, 加美兰, 下凹, 调音, 印尼
爪哇加美兰大锣是"下凹"最恢弘的应用：φ60–100 cm 的高锡青铜圆坯架在深坑窝砳上，四人轮锤把中心沉出 15–20 cm 深膛，随后逐圈锤出锣脐并整体调音——刮膛降音、锤边升音。中爪哇 Pande 铸匠家族工坊一口大锣需 5–10 天、回火 20 次以上，成品必须与整套乐器对音才能交付。这套纯手工沉膛工序至今没有机械替代，是成套定制加美兰的活态核心技艺。
The great gongs of Javanese gamelan are sinking at its most monumental: a φ60–100 cm high-tin bronze disc sits over a deep pit-form while four smiths sink the centre 15–20 cm by relay hammering, then raise the boss ring by ring and tune the whole—scraping the bore lowers pitch, hammering the rim raises it. A large gong takes a central-Javanese Pande workshop 5–10 days and 20+ re-heats, delivered only after being tuned against the full ensemble. No machine replaces this process; it remains the living core of bespoke gamelan making.