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To lower a note that's already flat, there is such a thing as a double-flat.

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Q: What accidental lowers a flat by one semitone?
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What is the accidental that erases a sharp or a flat called?

It is called a "natural" sign, and it cancels out/naturalizes a sharp or a flat.


What accidental lowers a note by one semitone?

if you are playing a brass instrument you tighten or loosen your ambocure (lips) to come out with a higher or lower note a sharp


What does a flat do to a note?

It lowers the note by one half-step/semitone.


What is the diatonic semitone above c flat?

c flat. the semitone above b flat is b, with is equal to c flat. So the diatonic semitone is c flat because it has to be a different note name.


Lowers a note one half step?

a flat lowers a not a half step


What does a flat do to a pitch?

It lowers the tone by one half step.


What raises a pitch by one half step?

The symbol to lower a note a half step is called a flat.


How many steps in a semitone?

A semitone is one half-step.


Is d to d sharp a semitone or a tone apart?

It's one half-step, or one semitone.


What does a double sharp do to a note?

Raises it by a semitone


What is the function of sharp and flats?

Sharps are the note one semitone higher than a given natural note, for example, D-sharp is one semitone higherthan D.Flats are the note one semitone lower than a given natural note, so D-flat is one semitone lower than D.Natural signs get rid of a previous sharp or flat in the same bar, or raises or lowers a sharp or flat already included in the key signature - e.g. the F-sharp in G major.Sharps and flats can be modified further too - resulting in a double sharp or double flat - which means that any double sharp or double flat will be a whole tone higher or lower than a given natural note, for example, D double-sharp would be the same key as E and D double-flat would be the same as C. Again a natural sign would get rid of the double flat or sharp.Sometimes natural keys have to be named as either sharp or flat, e.g. in C-sharp minor the seventh degree is B, but we have to raise B to B-sharp to create a C-sharp harmonic minor scale, which uses a raised seventh. Now we could call the B-sharp 'C' but that would not be correct as we need to use all letter names in a diatonic scale, and technically the C is functioning as a raised B in the key or C-sharp minor.


What is the Enharmonic equivalent to B double flat?

"Flat" means to go down one semitone. Look at a piano (or similar) keyboard, and check what you have one to the left of "C". Since on a piano there is no black key between "B" and "C", the next semitone down from "C" is simply "B".