Wow, eleven pages discussing how useless it is to give tubas a size wherein a bulk of the conversation has been kept alive by some of TF's most knowledgeable members.
And it's not the first time. Or the first forum.
So....I guess I'll join in...again.
I'm happy with the tuba fraction system. Yes, it's meaningless, unless everyone agrees that it, however vague, means something. More or less.
So if it means nothing to you: STAY AWAY. It's pretty confusing. A Miraphone 1291 is often referred to as a 5/4. So is the 496. The 496 has a bit larger, broader, more open sound when compared back to back. But they basically are both usable for the same type of work.
I've noticed that the "tuba community often"(my opinion/observation) uses the fractions to describe a tubas "functional" sound. (When looking for an orchestra tuba avoid travel tubas: too specific).
3/4 for small tubas with a small sound (kid size, quintet size)
4/4 for medium sized tubas are all around but "might" be a lot of work for most people when used in a large ensemble. Great for quintets, big bands, combos. For years often used in orchestras and still are to this day.
5/4 for the modern day all around, small to large ensembles. Also easier to use when one is the only bass player in a group.
6/4 large ensemble work and "bass player" work. Most people find them to be a lot of work air wise so make sure it works for you.
And that's what goes through MY head when I see fractions. I basically think; "oh yeah, more or less that size of sound"
More or less