The organ contains 66 stops, with 4781 pipes of 79 ranks. Its tonal design can best be described as Neo Classic which employs the best principles of the past three centuries of organ building.  In broad terms, it comprises the Pleno or Grand Jeu of the 17th and 18th on every division, plus the brilliant Trompette choruses of the 19th century and the colorful solo stops of all three centuries.centuries.  While most pipes are made of metal, the largest pipes, those of the 32' Untersatz are built of pine. The largest pipe of this stop , low CCCC, is 32 feet high and nearly two feet square. Many of the smaller pipes are the size of pencils.

 In 1983, the college received a gift from Alfred M.C. MacColl, '54 to add the organ's most powerful stop,a high pressure horizontal reed, the Trompette de Jubilé 8'' in celebration of the Chapels 50th anniversary. David Broome, then Tonal Director of Austin Organs, Inc., together with College Organist John Rose determined the specifications for the desired tonal character of this important addition to the original tonal scheme.

The Music gallery, beneath the organ casework, was given by family and friends in memory of A. Henry Moses '28, a Trustee of the College for 36 years. The gallery was designed by another alumnus Charles Nazarian '73, and was dedicated in 1984.

With the support of then College President James F. English, Jr. and the late Vice President of Development, Constance Ware, plans were drawn up for the carved oak casework of the organ by designer Charles Nazarian, '72. Funding for this project was provided by the Stone Foundation of Darien, CT in honor of Paul Adams, '34. The completed casework, built by Mr. Nazarian's firm in Gloucester, MA was dedicated in 1986. The detailed oak carvings in the casework were carved by sculptor Morgan Faulds Pike.

In 1992 a new 5 stop mechanical action pipe organ by Nicholson & Co. of Malvern, England was installed in the Crypt Chapel.