Allen Organ Company MDS-30 LDS Manual page 19

Due to the immense capabilities of the Allen Digital Computer Organ, every stop
and coupler on the instrument could be used simultaneously without distortion, if
the organ is adjusted properly. In good registration practice, however, the organist
would not haphazardly put on every stop on the instrument. For best results, listen
and include only those stops that really contribute to the fullness and brilliance of
the ensemble. Eliminate soft stops and solo stops that make no purposeful
contribution.
This short treatment barely scratches the surface of the fascinating subject of organ
registration. For those interested in gaining further insight into this vital area of
organ playing, we recommend the following texts:
Audsley, George Ashdown. Organ Stops and their Artistic Registration.
Hialeah, FL: C.P.P. Belwin, 1985.
Irwin, Stevens. Dictionary of Pipe Organ Stops. 2nd ed.
New York: Macmillan Books, 1983.
MDS-30 LDS
FULL ORGAN
15 Section II