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English definition of “synthesizer”

synthesizer

noun [C] (UK usually synthesiser)     /ˈsɪn.θə.saɪ.zər/ US  /-zɚ/
an electronic keyboard instrument that can produce and combine a large range of recorded sounds, often in order to copy other musical instruments or voicesKeyboard instruments
(Definition of synthesizer noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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