Hoorn in A♭
- longName: Horn in A♭
- shortName: A♭ Hn.
- description: A♭ Horn
- musicXMLid: brass.natural-horn
- clef: G
- transposingClef: not set
- concertClef: not set
- barlineSpan: 1
- aPitchRange: 42-75
- pPitchRange: 38-80
- transposeDiatonic: -2
- transposeChromatic: -4