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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.
Look at the number of keys on the keyboard. Digital keyboards can have as few as 25 keys or as many as 88. Digital pianos have the full 88 keys of a standard piano keyboard, and most workstations have at least 61 keys or more. Lower-end synthesizers may have as few as 25 keys, although most home-use keyboards come with 49, 61, or 76 keys. The more keys, the greater the instrument's range.