Historical
background:
the instruments. 
In 1902 Alois Decap and his son Livien founded an organ business which would grow to be one of the largest of its kind in Belgium.
At first they only repaired organs which they hired out, but later began to build fair organs for other customers. Gradually the product range grew and over the years included roll and book playing orchestrions, fair organs, street organs, dance organs, electronic organs, Robot organs and combination pipe and electronic organs.
Eventually the scales and dispositions of the various instruments were standardised. The company built 72, 92 and 121 key pipe organs; 72, 92 and 105 key electronic organs; 92 and 105 key Robot organs and 105 key combination pipe and electronic organs.
In the
1980’s computer control was introduced, as were accordion-playing figures;
since 1989 52 key street organs have also been made. The first MIDI
computer-controlled organ was built in 1996.