Registration

In organ or harpsichord playing, the registration is the specific quality of tone that is produced by a combination of stops or strings in use. The registration may be changed by using different pipes in the organ, or different combinations of strings or jacks in the harpsichord. When the registration is changed, the sound produced is varied from the original sound.the choice of stops used by an organist or harpsichordist, a much more elaborate matter for the former