The classical organ of the Saint Augustine church was constructed between 1837 and 1839 by Theodoor Smet, who originally came from Geel but worked in Duffel. An inscription on the casing of the organ commemorates the induction of the organ in 1839 under parish priest Eliaerts: A.M.D.G. – CURA REV. ADM. DOM. PASTORIS M.I. ELIAERTS – AERE PAROCHIANORUM – ARTE THEODORI SMET GHELENSIS – AO MDCCCXXXIX EXSTRUCTUM.
Nine additional stops were first added to the organ sometime before 1865. This work was most likely carried out by Henri Vermeersch, the successor of Smet. Eventually, Vermeersch and his son-in-law Petrus Stevens took over the company together and rebuilt the instrument in 1891-an unfortunate choice according to experts.
In 1930 father Ferdinand Peeters s.j. described the organ as follows:
“On a narrowly made base is a sculpted medallion, where an image of Saint Augustinus in half elevated sculpture is formed. This medallion is surrounded by floral garlands carried by angels. Just above that the woodwork widens to support the traditional tin organ pipes. These organ pipes are divided here in three groups and stand with uneven numbers of rounded crown mouldings, which are supported by means of Corinthian pillars. Light curtains formed from metal pipes connect the three groups. Above the middle group stands a crowned image of David, playing the harp, and nearby at the ends, there are angels playing music. Although these groups and the entire oak panelling don’t compare to the gorgeous sculptures of the 17th century, still one has to admit that they have a beautiful appearance and are not misplaced.”
As of 2005 this two manual organ with 22 registers is partially dismantled and unplayable. The sound still remains a well kept secret. The instrument will in fact be returned to its original state as soon as possible.