If there is a flat sign at the beginning of a baron, lets say B. Does that mean that the lower B and higher B which are on the ledger lines/which are one octave higher or lower, are flats aswell?

If its in the key signature yes, unless another accidental is in front of it. If its only in one bar then it carries on the whole way through the bar regardless of octave. the next bar line would then cancel out the accidental in the previous bar. Hope that's not too confusing!
jess

A flat in the key signature affects that note in any octave. But an accidental only affects the note in the octave it was originally applied to. If you had the same note an octave higher or lower in the same bar it would not be flattened, unless it had its own accidental of course.

QUOTE

If you had the same note an octave higher or lower in the same bar it would not be flattened, unless it had its own accidental of course.

Ah I never knew that! It seems I've been getting away with it for some time now but thank you, that's useful to know

even thought it was my question thanks nutter for explaining and thanx to juze for clearing it up. thanx for answering MY question.

eh?

I second that!