analog summing circuit 求和电路
analog summing amplifier 模拟加法放大器
analog summing
模拟求和
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Unfortunately for lovers of dust and beautifully over-engineered gear, the room-sized recording console is dying out fast, replaced by software and small, neat, racks of pre-amps and analog summing mixers.
ENGADGET: Music Thing: Frontier Alphatrack
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