What musical instrument is Corni in C?

The corni in C is a type of horn, a brass instrument in the key of C. It is a member of the brass family and is closely related to the trumpet and the tuba. The corni in C is a transposing instrument, meaning that the notes played on the instrument sound a different pitch than what is written on the sheet music. For example, when a C is played on the corni in C, it actually sounds as a Bb. This is because the corni in C is pitched in Bb, and the C fingering produces the note Bb. The corni in C is a versatile instrument and is used in a variety of musical genres, including classical, jazz, and pop music.