The American pipe organ is a musical instrument that produces sound by forcing air through pipes. It is commonly found in churches, concert halls, and theaters, where it is used for both religious and secular music. The instrument typically features multiple keyboards, known as manuals, and a pedalboard for playing bass notes. These organs can vary greatly in size and complexity, from small instruments with a few ranks of pipes to large, elaborate systems with hundreds of pipes. The design and construction of the American pipe organ have been influenced by various styles, including those from European organ builders and Romantic music traditions.