Characteristics of the seven tubas studied in this paper, classified in the same order as in Figure 1. By convention, the nominal pitch specifies a number of feet (ft) coupled with a musical pitch name, being the nominal fundamental of the instrument (lowest note playable without any valve depressed). The number of feet corresponds to the equivalent cone length , related to the frequency Fnom of its nominal fundamental by the formula , with c0 the speed of sound in the air.
|B♭-contrabass tuba||C-contrabass tuba||E♭-bass tuba||F-bass tuba||B♭-euphonium||B♭-bass saxhorn||B♭-baritone saxhorn|
|Nominal pitch||18-ft B♭||16-ft C||13-ft E♭||12-ft F||9-ft B♭||9-ft B♭||9-ft B♭|
|Mouthpiece||Perantucci PT-50||Perantucci PT-50||Romera FT20||Romera FT20||A. Courtois T2||A. Courtois T2||A. Courtois T2|
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