Trompette basse en Do
- longName: Bass Trumpet in C
- shortName: B. Tpt. C
- description: Bass Trumpet in C
- musicXMLid: brass.trumpet.bass
- clef: not set
- transposingClef: G
- concertClef: G8vb
- barlineSpan: 1
- aPitchRange: 39-66
- pPitchRange: 39-69
- transposeDiatonic: -7
- transposeChromatic: -12