Subbass

The register known as "Subbass" in a pipe organ is designed to produce low-pitched sounds that add depth and foundation to the organ's tonal range. It is a pedal stop that generates the lowest notes in the instrument. In terms of construction, the pipes of the Subbass register are typically made of wood or metal. The choice of material can vary depending on the organ builder's preference and the desired tonal quality. Wooden pipes are often used for Subbass stops to achieve a warm and resonant bass sound, while metal pipes can provide a brighter and more focused tone. The pipes for the Subbass stop are usually of a large diameter and have a conical or cylindrical shape. The larger size of the pipes allows them to produce low frequencies with sufficient power and richness. The length of the pipes determines the pitch they produce, with longer pipes producing lower notes. Due to the low frequencies involved, Subbass pipes are often constructed as open pipes, which means they lack a resonator or stopper at the top. This allows for the production of deep, rumbling sounds. The pipes are typically made in a stopped format, where they are closed at the top, allowing the air to resonate within the pipe and generate the desired pitch. The Subbass pipes can be quite large, both in length and width, to produce the lower pitches required. Their size and placement in the organ are crucial for creating a strong foundation and providing a sense of power and depth to the overall organ sound.