Two instruments transpose in the key of F: the French horn and the English horn. Both the French horn and the English horn (which is a tenor oboe) transpose in the same way, exactly a fifth away.

If a composer writes a melody in concert key and wants the French horn and English horn to play correctly, he must write the melody up a perfect fifth for it to sound correct (see figure 14.7).

FIGURE 14.7 French / English Horn Transpose