Synthesizer/(合成器) -> Electroacoustic Instruments/(电声乐器) -> Sound Production and Manipulation [SPM]/(制作与处理)

Synthesizer/(合成器) -> Electroacoustic Instruments/(电声乐器) -> #[Tier 4] Technical Aspects for Technologists/([第四]技术层为技术员) -> Users Group/(用户群)