Hey, I don't have a picture to demonstrate this but:

If I have a piece in F major for example and within it comes up a notated Bb. Is this note Bb, or a B double flat (enharmonic to A natural)? Same if a B# comes up in the same piece, does it become a C or B?

Hope it makes sense!

Just had my grade 5 theory exam today, so I'm trying to see if I made a mistake, though I should of asked this beforehand
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woha... looks like i have to take a look into my books... (i had my theory classes ages ago)
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It's Bb. Accidentals don't 'stack' on top of the key signature.
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If it were in F major and the B# popped up, I'd imagine it would be a B natural. I'd also imagine the noted Bb would be a Bbb (or an A, like you said). I can't think why it would be noted like that, unless in a diminished chord or something though.

Edit: Other people seem to know more than, never mind.
Last edited by sadistic_monkey at Jun 14, 2008,
Quote by Pure_Morning

If I have a piece in F major for example and within it comes up a notated Bb. Is this note Bb, or a B double flat (enharmonic to A natural)? Same if a B# comes up in the same piece, does it become a C or B?

the B# will be a C. To get a B it would be B natural (with the lil sign thingy, ya get me?)

As with the b double flat thing. i think your right about the double flat, as F maj has a Bb in its key (i think), so a normal Bb would be shown as just a B... so if a Bb is shown, thatll be a Bbb.. so an A in other words...

its always whats written so it would be a Bb, if it were a double flat, it would be written as A

C, B#doesn't really exist because b and c are only a half step apart
F major has a Bb in the key signature, so if Bb comes up, it's Bbb, or A. therefore, if B# comes up, it's B natural.
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If it were in F major and the B# popped up, I'd imagine it would be a B natural. I'd also imagine the noted Bb would be a Bbb (or an A, like you said). I can't think why it would be noted like that, unless in a diminished chord or something though.

Edit: Other people seem to know more than, never mind.

No it wouldn't, it would be B#, and for it to be B natural, a natural sign would have to be written before the note. That Bb may have been written in the same bar where there was a natural or a sharp sign before another B note, otherwise I don't see why it should be written there.
any time that a double flat is meant to be played, it MUST be notated as a double flat, there are NO exceptions to this rule. if the song is in the key of F major, and the note is marked as B-flat, then it is just a B-flat/A-sharp. if the B is sharped, then a C would be played.
Quote by CocoRoos
any time that a double flat is meant to be played, it MUST be notated as a double flat, there are NO exceptions to this rule. if the song is in the key of F major, and the note is marked as B-flat, then it is just a B-flat/A-sharp. if the B is sharped, then a C would be played.

Correct
As far as I'm aware, accidentals aren't effected by the key signature at all. If it says B#, (which it won't because B# doesn't exist, although I think it can be written) you would just play a B# and this applies to pretty much everything. From my understanding anyway.
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Correct

Well, not 100%, if the B is #, you don't play a C, you play a B#. Pedantic, i know.
Cheers guys!

Luckily, I answered the question as if it was Bb (rather than an A) so hopefully I should be fine.
My "Rig":

Fender American Telecaster
Boss OD-2
EHX Small Clone
EHX SMM avec HAZARAI