akkordrad - rotating discs for the determination of the shades of chords or for checking whether certain predetermined sounds form a useful chord

摘要

Three differently large concentrically around a common point of rotatable discs, arranged so that the respectively smaller disks lie on top and the outer edges of all the discs can be seen from the top view are. The disks are shown in (at least) 12 equally large sectors, wherein sectors on all slices in the same manner, a clay the stammtonreihe (c, c #, d, d #, e, f, f #, g, g #, a, b, h) is associated with. Various sectors on the disks are so as to be colored or otherwise to be marked in that, whenever a circular segment of the chord wheel has a uniform color / marking, the sounds in all 12 segments those chord type show, to which these color or marking previously been assigned a.