You will be glad to know that earlier this month, five pages of discussion were devoted to an exhaustive discussion of this very matter: Cf. viewtopic.php?f=2&t=47557KiltieTuba wrote:Below the pedal BBb is the double pedal range. Low F (four lines down) is the pedal range since that would be the pedal FF on the F tuba.
A couple comments:
- "Below the pedal BBb ..." In this context, the doubled upper case BBb means to me that you're using "English notation" for the note below the 2nd ledger line below the bass staff.
- "... since that would be the pedal FF on the F tuba." ... So, we surmise that you really may have meant BBBb in the previous statement. One widely held notion of "pedal" would start there and go down, for a BBb tuba, but you're welcome to attach whatever meaning you want to it, as we discovered in the referenced thread that the term is useless for communication.
- Though not as useless as "low Bb".

