Refers to the moment when all the instruments are playing together in the big band swing style.

Tuti: refers to the moment when all the instruments in the band or orchestra play at the same time.

Explanation:

Tutti in italian means eveyone or all, this is a mark that the orchestrator or aranger give for the entire band to play at the same time.

c, d, e, f, g, a, b, and c.

sometimes western music will also use solfege. the names of these are do ra me fa sol la si (or ti) and do.

to indicate a note a half step higher or lower then the original note, you would say c # (for a half a step above c) or bb (for half a step below b)