『악학궤범』의 척도연구

A Study of the Measurement of Akhakkwebeom, Focusing on the Pyeon-gyeong

The Akhakkwebeom is more accurate and valuable than any other music treatises in that it recorded the pictures, illustrations, and the measurements of the instruments. However, it contains inaccurate descriptions because of the compiler s misunderstanding between theory and practice. The Akhakkwebeom used two kinds of rulers, the yeongjo ruler and pobaek ruler, and it uses the former for measuring the instruments. Four aspects should be considered with relation to the yardstick of measuring instruments. First, the length of the hwangjongjang of 12 yurwijangdoseol, 9 chon; Second, the awareness of the length of dongyulgwan created during the reign of King Sejong; Third, the proportional length between the hwangjong ruler and yeongjo ruler that is 1:0.899; Forth: the measurement of the instruments actual length measured by the yeongjo ruler. The yeongjo ruler was used for establishing buildings or heavy facilities, and the reason it was used for producing instruments was because the creation of hwangjongyulgwan failed, and only 1 li of difference existed between the yeongjo ruler and the length of dongyulgwan transmitted at the Jangagweon at that time. Although the hwangjongjang was 1 cheok, Seonghyeon erroneously applied the old theory of 9 chon and mistook the difference of length 101 li for 1 li. The actual length of the yeongjo ruler and the results of the existing studies on the yeongjo ruler are approximately 30-31cm, and the length of the yeongjo ruler examined by the author is approximately the same length as well. Considering that the length of the yeongjo ruler has not changed greatly, and that the pitches of the aak have not changed, the length of the yeongjo ruler between today and during the period of Akhakkwebeom is assumed to be not very different.