The number keys on the keyboard – a key feature that distinguishes the different types of synthesizers and digital pianos. Standard keyboard synthesizer has 61 key (5 octaves). Compact and affordable, these synthesizers have fairly wide range of functions and high-quality acoustics, the firm is a Casio model CTK lines and LK (backlit keyboard). They are designed primarily for home use, very convenient for travel. The model with the highest features and with relatively low cost – it STK-5000, and the backlit keyboard model (LK-220, LK-230, LK-270 and LK-300) specifically designed for learning to play the piano. Synthesizer with an increased number of keys contain 6.5 octaves (76 keys). They usually belong to a semi-musical instruments, can be used not only at home but also on-stage.
Casio has developed a special line of tools WK (The most popular model in this series – WK-500, and most inexpensive – WK-110). Digital pianos include 88 keys, 7.5 octave range. Why so much? Because that's key in an acoustic piano. In a question-answer forum Energy Capital Partners was the first to reply. Therefore, they are sometimes call polnooktavnymi tools. Polnooktavnyh synthesizers produced quite a few, this Casio WK-8000. The active keyboard (dynamic keyboard) – the keyboard with touch-sensitive. Loudness of sound depends on force pressing the keys as on a conventional piano or piano.
Active Keyboard is installed on any and all digital pianos, as well as on most keyboards. Active keyboard can be disabled (this is called function Touch Response), it is used for certain tones, such as organ or harpsichord. The intensity of sound at the same time can be adjusted (from 1 to 3).