Editing French horn (section)

===Single horn===
Single horns use a single set of tubes connected to the valves. This allows for simplicity of use and a much lighter weight. They are usually in the keys of F or B{{music|flat}}, although many F horns have longer slides to tune them to E{{music|flat}}, and almost all B{{music|flat}} horns have a valve to put them in the key of A. The problem with single horns is the inevitable choice between accuracy or tone – while the F horn has the "typical" horn sound, above third-space C accuracy is a concern for the majority of players because, by its nature, one plays high in the horn's harmonic series where the overtones are closer together. This led to the development of the B{{music|flat}} horn, which, although easier to play accurately, has a less desirable sound in the mid and especially the low register where it is not able to play all of the notes. The solution has been the development of the double horn, which combines the two into one horn with a single lead pipe and bell. Both main types of single horns are still used today as student models because they are cheaper and lighter than double horns. In addition, the single B{{music|flat}} horns are sometimes used in solo and chamber performances and the single F survives orchestrally as the Vienna horn. Additionally, single F alto and B{{music|flat}} alto descants are used in the performance of some baroque horn concertos and F, B{{music|flat}} and F alto singles are occasionally used by [[jazz]] performers.

[[Dennis Brain]]'s benchmark recordings of the [[Horn Concertos (Mozart)|Mozart Horn Concerti]] were made on a single B{{music|flat}} instrument by [[Gebr. Alexander]], now on display at the [[Royal Academy of Music]] in London.