A#/Bb
There are 7 octaves, plus a minor third, on standard Grand Pianos. Therefore, the lowest accidental (or black key) would be a B Flat.
The middle black key in the set of three black keys
if you have a piano then press a black key. it also depends on the key you are pressing too, as different keys make different sounds.
There are 36 black piano keys that are raised and further back than the white keys. The black key on the right of a white key is a sharp and the one on the left of the white key is a flat.
There are 7 octaves on a standard grand piano (plus a minor third, or one additional "black key"). If each octave has 5 accidentals (or black keys) then 7 octaves would have 35 black keys, plus the additional B Flat at the bottom of the piano.....so: A 72 key piano has 36 black keys.
Ab is the middle black key in group of three black keys on the piano.
a half step
E# is F on the piano, as F is 1/2 step up from e. b# would likewise be C on the piano.
The three grouped black piano keys are F#, G# and A#, also notated as Gb, Ab and Bb. The two grouped piano keys above them are C# and D#, also notated as Db and Eb. The pattern continues for as many octaves as necessary. Given that bottom A is usually the lowest note on a piano, the first black key is A# or Bb.
the black keys on the piano are sharps and flats. If the note is flat they you will play the next key to the left. If they note is sharp, you will play the next key to the right.
If you'll locate where there are 3 black keys together, it is the white key that is just after the first black key.
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.