Are there any ways to remember the keys of the piano?

The piano adopts an average rhythm of 12, and can play all 12 major and 12 minor (a ***24 major and minor). Except for C major and A minor, there are no sharp and flat semitones, and other major and minor tones belong to six sharp and six flat semitones respectively. Let's talk about the simplest identification method: 1, semitone: No matter how many semitones there are, just look at which note the last semitone falls on (that is the position of the seventh major (tonic)), and the tone next to the semitone to its right is the tonic of major. If key signature has two sharp semitones, the last one is C sharp, that is, D major or B minor ... When you see key signature with three sharp semitones, the last one is G sharp semitone, which is a major or #f minor ... 2. Flat semitone: except for the first F major D minor, key signature with the second to fifth flat semitones, you only need to identify the penultimate flat semitone. If you look at key signature with two flat tones, its penultimate flat tone is B flat, that is, B flat major (or G minor). If you look at key signature with four flat tones, and its penultimate flat tone is D, then this key signature is D flat major (or B flat minor).

If you want to identify various tonality more accurately and professionally, you need to learn the basic knowledge of music theory. To put it simply here: tonality comes from the relationship of "five degrees of co-occurrence" For example, all the six high notes are produced by the superposition of circle of fifths in turn. The formula for memorizing the sound is six tones: "f (fa)-c (do)-g (sol)-d (re)-a (la)-e (mi)-b (si)", which is actually just "1 tone that needs to be improved every time a new tone is generated. G major and E minor each have a semitone (#F) and two semitones (keep #F)+#C: D major and B minor; Three sharp sounds (keep #F #C )+#G: A major #F minor, four sharp sounds (keep #F #C #G)+#D: E major #C minor, five sharp sounds (keep # f # c #g # d)+# a: B major #G minor; Six sharp notes (keep #F #C #G #D #A) +#E: #F major #D minor. Second, six key signature drops are generated by sequentially cycling and overlapping down five degrees. Ping Jian's formula is also six tones: b (si)-e (mi)-a (la)-d (re)-g (sol)-c (do)-f (fa). A key (bB):F major and D minor; Two flat semitones (BB reserved) +BE: B flat major and G minor; Three flat tones (keep bB bE) +bA: E major and C minor; Four flat tones (keep bB as bA )+bD: A flat major and F minor; Five flat semitones (keep bB bE bA bD )+bG: D flat major and B flat minor; Six flat semitones (keep bB bE bA bD bG )+bC: G flat major and E flat minor.