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.
G. Coverdale Sharpe has written: 'Liberty at the cross-roads'
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.
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
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.
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.
Not at all sure what you are asking, but if you are asking "What does two flats in the music mean?" it means that the key of the piece is either B flat or G minor. They both have the key signature of two flats. If there are 2 flat signs next to a singular note in the middle of the piece, it could mean that it is a double flat, and A double flat is the same as G, a double flat is 2 semitones down.