C tuba with 3 or 4 valves: every note and the valves to press, with the usual alternatives.
D♭1*
D1
E♭1
E1
F1or 1+4
G♭1or 1+2+3
G1or 1+3
A♭1
A1or 3
B♭1
B1
C2
D♭2or 1+2+3
D2or 1+3
E♭2
E2or 3
F2
G♭2
G2
A♭2
A2or 3
B♭2
B2
C3
D♭3or 3
D3
E♭3
E3
F3
G♭3
G3
A♭3
A3or 3
B♭3
B3
C4
D♭4or 3or 2
D4or 0
E♭4
E4
F4
G♭4
G4
* Needs a compensating tuba or a 5th valve.