the note is an A This question is not clear; assuming 'half a step' means a semitone then the answer is G# aka Ab.
A
To make a note flat, you take it down a half step: e turns into e flat and e flat turns into D natural. Natural just means the plain old note with nothing done to it. Therefore, to take a G flat up a half step, it turns into a G natural.
No. On a certain note with both a sharp and flat, (G, for example) they are the same distance from G, but going in diferent directions. G sharp raises the note by one half step while G flat lowers the note by one half step. However, it is possible for a sharp note to mean the same note as a flat note. For example, G sharp is the same note as A flat. This is called being enharmonic.
G sharp
The first open note above a low G: CThe first open note above the G on the staff: CThe first open note above the G above the staff: A
A
To make a note flat, you take it down a half step: e turns into e flat and e flat turns into D natural. Natural just means the plain old note with nothing done to it. Therefore, to take a G flat up a half step, it turns into a G natural.
No. On a certain note with both a sharp and flat, (G, for example) they are the same distance from G, but going in diferent directions. G sharp raises the note by one half step while G flat lowers the note by one half step. However, it is possible for a sharp note to mean the same note as a flat note. For example, G sharp is the same note as A flat. This is called being enharmonic.
G sharp
G is half a note higher than F#. The full scale is C C# D D# E F F# G G# A A# B C
A sharp raises a note by half a step, while a flat lowers a note by half a step on the piano. For example, if a note is played as C♯, it is one half step higher than C; if played as C♭, it is one half step lower than C.
The note above F can be labelled as F sharp or G flat.
G is half a note higher than F#. The full scale is C C# D D# E F F# G G# A A# B C
In music theory, the term "G" signifies a note that is one half step higher than G. It is known as a sharp note because it is raised in pitch.
The first open note above a low G: CThe first open note above the G on the staff: CThe first open note above the G above the staff: A
There are seven main notes, A, B, C, D, E, F, G which can be played in infinite octaves. Each note also has a sharp (one half step up) and a flat (on half step down). The main notes are the white keys on the piano and except in very certain cases the flats and sharps are the black keys.
There are a total of seven sharps and seven flats. However, in different key signatures there are different numbers of sharps and flats (not all have seven sharps or seven flats)! Another thing to note is that a key signature can only have sharps or only have flats (they never mix- at least not in the key signature). Or they can have no sharps or flats, as in the case of C Major and A minor.