F major

F major (or the key of F) is a major scale based on F, with the pitches F, G, A, B, C, D, and E. Its key signature has one flat: B. Its relative minor is D minor and its parallel minor is F minor. 
The F major scale is:
\override Score.TimeSignature #'stencil = ##f
\relative c' {
 \clef treble \key f \major \time 7/4 f4 g a bes c d e f e d c bes a g f2
 \clef bass \key f \major
</score>
F major is the home key of the English horn, the basset horn, the horn in F, the trumpet in F and the bass Wagner tuba. Thus, music in F major for these transposing instruments is written in C major. Most of these sound a perfect fifth lower than written, with the exception of the trumpet in F which sounds a fourth higher. (The basset horn also often sounds an octave and a fifth lower.)