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Seven white keys and five black keys form an octave. As you already know, now pianos have 88 keys, that is, 7Â¼ octaves. As a rule, there are 52 white keys and 36 black keys on a regular piano. However, not only standard 88 key pianos are used now. Some well-known piano makers produce instruments with different number of keys. For example, there are 92 of them in BÃ¶sendorfer 225, and even 97 keys in BÃ¶sendorfer 290.
In this lesson, you will name all the black keys on the piano keyboard. Each black key is given two names. Their names are based on which white keys surround them. Take a look at the groups of two black keys. Let's look at the black key on the left. Notice that it is surrounded by C and D. Because it is to the right of C, it is called C Sharp, (written C#). It is also known as D Flat (written Db) because it is to the left of D. Take a look at the groups of two black keys again. Let's look at the black key on the right. Notice that it is surrounded by D and E. Because it is to the right of D, it is called D Sharp, (written D#).