Tournebout Grande basse
- longName: Greatbass Crumhorn
- shortName: Gb. Crh.
- description: Greatbass Crumhorn
- musicXMLid: wind.reed.crumhorn.great-bass
- clef: F
- transposingClef: not set
- concertClef: not set
- barlineSpan: 1
- aPitchRange: 36-50
- pPitchRange: 36-53
- transposeDiatonic: not set
- transposeChromatic: not set