or BISDIAPASON, in Music, a compound concord, described by F. Parran, in the quadruple ratio of 4 : 1, or 8 : 2.

DISDIAPASON Diapente, a concord in a sextuple ratio of 1 : 6.

DISDIAPASON Semi-Diapente, a compound concord in the proportion of 16 : 3.

DISDIAPASON Ditone, a compound consonance in the proportion of 10 : 2.

DISDIAPASON Semi-Ditone, a compound concord in the proportion of 24 : 5.