The earliest musical instruments were likely to have been natural objects that resonated in some way when struck or beaten.
There is still a category of instruments which are essentially objects designed for other purposes but used this way, sometimes with humorous intent - these include the washboard, the pocket comb with tissue paper, and the spoons.
The following is a list, which may never be complete, of musical instruments. It is divided into "acoustic" and "electric" sections.
*Various [[keyboard]] instruments
*[[Synthesizer]]
*Some would consider the [[tape recorder]] to be an instrument.
*[[Theremin]]
*[[Turntable]]