Yes, A flat is the same black key as G sharp on the piano. It is the middle black key in the three black key groups.
No.
G sharp is also A flat.
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G-sharp is the same as A-flat.
No. An A flat is the same as a G sharp and an A sharp is the same as a B flat. A flat and A sharps are two different notes, although they are the same distance from A.
F sharp and G flat are the same. F sharp is a half octave up from a F and a G flat is a half octave lower than a G.
an a flat only can be called an a flat There is no double sharp equivalent, but it is the same as G sharp.
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.
D flat F G B flat A flat F D flat B flat A flat A flat A flat then E flat G A C B flat G E flat C etc. Ending G G G G A flat D flat D flat D flat D flat
F# and Gb are enharmonics. They share the same pitch, but have different functions in musical notation. Especially attuned musicians may differentiate F# and Gb particularly when they appear as thirds or fifths of chords, but yes, they are enharmonic equivalents.
It would be the same an F sharp. So just the middle valve.
Yes, F sharp and G flat are enharmonically equivalent notes, meaning they sound the same pitch but are written differently depending on the context of the music.