or Bisdiapason, in music, a com- pound concord, described by F. Parran, in the qua- druple 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.