|hornbostel_sachs_desc=Valved aerophone sounded by lip vibration
|range=[[ไฟล์:Range_of_horn.png|200px|center]]
|range=[[File:Range_of_horn.png|200px|center]]In F the horn sounds a [[perfect fifth]] lower than written. In older music, bass-clef notes are written one octave lower and thus sound a [[perfect fourth]] higher than written.<ref name="Walter">{{Cite book |title=Orchestration |url=https://archive.org/details/orchestration0000pist |url-access=registration |last=Piston |first= Walter |date=1955 |publisher=Norton |isbn=978-0393097405 |edition=1st |location=New York |oclc=300471}}</ref>
