The naming of the "diapason stop" in organs is due to its ability to produce a wide range of sounds across various octaves or pitch ranges. According to IPA phonetic transcription, the word is spelled as /daɪəˈpeɪz(ə)n/ or "dye-uh-PAY-zuh n". It is derived from the Greek words "dia" meaning "through" and "pason" meaning "all", signifying the ability of this stop to produce sounds of all pitches. The diapason stop is essential in creating the full and rich sound of pipe organs.
A diapason stop is a type of organ stop commonly found in pipe organs. It is named after the Greek word "diapason," which means "through all." The diapason stop is characterized by its rich and full tone, considered to be the foundation of the organ's sound.
The diapason stop is designed to produce a pure and penetrating sound, with a wide range of harmonics. It is typically a principal stop, meaning it produces the fundamental pitch of the keyboard. The tone quality of a diapason stop is characterized by its clear, bright, and round sound. It is known for its ability to blend well with other stops, making it a versatile and widely used stop in organ compositions.
The pipes of a diapason stop are typically made of metal, although there are also wooden variations. The length and shape of the pipes determine the pitch and timbre of the sound produced. Diapason stop pipes often have a conical shape and are wider at the bottom than at the top.
The diapason stop is considered a fundamental component of the organ's tonal palette and is found on most organs. It contributes to the overall sound and character of the organ, providing a solid and powerful foundation for the rest of the stops. Its versatility, clarity, and penetrating sound make the diapason stop an essential part of organ music.
The term "diapason stop" originates from the merging of two different words with distinct origins.
1. Diapason: The word "diapason" comes from the Greek words "dia" meaning 'through' and "pason" meaning 'all'. In Ancient Greek music theory, the term was used to describe the full range of notes or intervals that were considered to be in perfect harmony. Over time, the word diapason evolved and began to refer specifically to the pitch range of musical sounds.
2. Stop: In the context of organ stops, the term "stop" refers to a control mechanism that allows the organist to add or remove different sets of pipes from the sound produced by the instrument. It comes from the Middle English word "stoppe", meaning 'to block or close off.