A synthesiser is capable of generating sounds through electronics. This musical device consists of oscillators and a `white noise' generator (white noise is a combination of all audio frequencies simultaneously). These frequencies and the wave forms of the oscillators, are governed and transmitted via several filters. The filters which are reverberation components, help modify the sound.
Robert Moog, an electronics professor, was the first person to make a model of the synthesiser available to the general market. The precise scope and application of the synthesiser, has been under discussion since the time that RCA revealed its first version in the 1950's. In those times it was usually looked upon as an invention aimed at superseding existing instruments. The opinion shown today leans more towards the view, that a synthesiser should be used in cooperation with traditional instruments, not against them.
A synthesiser-type musical instrument is the keyboards, a very popular instrument for the home. These tend to hold preset instrument sounds and give only basic control over low-level sound shaping.