Now many more instruments have been invented which have a keyboard as user-interface and has made handling much friendlier. It has also rendered musical equipment much more effective and clear. These are played with a musical keyboard. There are yet some more instruments with some extra means like stops for an organ or pedals fro piano to further manipulate various sounds. They can produce sounds by fanning wind or pumping various vibrating strings. These may be stirred by hammering in case of piano, plucking in case of harpsichord, electronic means in case of synthesizer or by any other means. This keyboard system has made musical equipment more musical, effective and user friendly.

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