壱越いちこつ

noun

fundamental tone in traditional Japanese 12-tone scale (approx. D)

Technical term in gagaku and traditional music theory; corresponds to the first note of the 十二律 (jūniritsu) system, roughly equivalent to D in Western music.

See also: 黄鐘 (こうしょう) · 十二律

• 雅が楽がくでは、壱いち越こつを基き準じゅん音おんとして調ちょう律りつする。

  In gagaku, the fundamental tone 壱越 is used as the reference pitch for tuning.