synthesizer

noun5

1. •
   An electronic musical instrument that creates its sounds with electronics and generally is played via a keyboard.
2. •
   An electronic instrument consisting of a module, or a set of modules, that creates its sounds with electronics and does not have any keyboard.
3. •
   A software program that allows a computer to be used as a musical instrument – virtual instrument
4. •
   An electronic circuit that generates an electronic signal oscillation with accurate timing from a reference oscillator.
5. •
   An electronic device that generates electronic signal patterns to test an electronic circuit.