The sound of the organ is produced by air moving through tuned pipes. Each pipe is tuned to a specific pitch and even an average size organ may consist of 1500-2000 of such pipes. The airflow is achieved by an electric motor.

The organ utilizes several different voices and there's a pipe to each key in each voice. Each voice has its own timbre defined by the size and the structure of the pipe. The church organ usually has 10-35 voices, and in some contemporary models these may be pre-programmed by computer. The term disposition stands for the list of voices and the technical specifications of the organ.

The pipes are divided in two categories - the flue and the reed. Flue pipes consist of violin and flute overtone voices; the reed pipes include all those resembling wind instruments like oboe, bassoon, trumpet and trombone. The pipes belonging to one timbre are called a voice.

The organ is compatible with brass or woodwinds in addition to many other instrument choices.

Recommended combinations:

Organ with trumpet
Organ with oboe
Organ with saxophone
Organ with violoncello