A problem with accidentals

[kristinazx]

Hello. Could someone tell me, if there is a flat or sharp in a measure ( tact), does the accidental apply till the end of measure ( only that measure)?

2.nd question ( much bigger problem). In the Prokofiev Toccata, there is an accidental on (for instance) C. And there are eighth ( octave). Does the accidental apply for all C´s in a measure, or only that C, which is signed? I would tell all C`s, but there are some strange sounds so I asked myself, is that so.

3.rd question: Suppose we have F major which has one flat B and we put again flat on B. Does it lower tone for 2 semitones? ( I havent met much that situations, but who knows).


Is there some other interesting things about accidentals, someone would need to know. In simple pieces, I havent had problems with them at all, but now, problems occurs and realize my lack of knowledge of Music Theory. ( Is there some website with all Music Theory, except these which are first in Google).


This bothers me a while so I hope, someone will understand my questions and respond?

Thanks.

[stevebob]

Hello. Could someone tell me, if there is a flat or sharp in a measure ( tact), does the accidental apply till the end of measure ( only that measure)?

Yes.

2.nd question ( much bigger problem). In the Prokofiev Toccata, there is an accidental on (for instance) C. And there are eighth ( octave). Does the accidental apply for all C´s in a measure, or only that C, which is signed?

Only to the C (to use your example) at that pitch, but not to any other C in different octaves.

3.rd question: Suppose we have F major which has one flat B and we put again flat on B. Does it lower tone for 2 semitones? ( I havent met much that situations, but who knows).

No, unless the symbol is a double flat:  ♭♭.  A single flat symbol in front of a B means B-flat in any key signature.

[kristinazx]

Yes.

Only to the C (to use your example) at that pitch, but not to any other C in different octaves.

No, unless the symbol is a double flat:  ♭♭.  A single flat symbol in front of a B means B-flat in any key signature.

Thank you, on your responses!

[chopinsmaster]

A bit more detail for you on third question: if there is already B flat in key signature, usually the reason you would find a flat next to a B in the measure is if there had been a natural on a B earlier in the same measure (because the natural would carry to the end of the measure so you would need the flat symbol for it to not be another B Natural)