English to Chinese Tech/Engineering IT (Information Technology) Digitization

If you have an analog turntable, digitizing 33-rpm LPs and 45-rpm single records is straightforward. Old-school turntables require grounding and a preamp, so you can’t plug them directly into most PC audio interfaces. Instead, connect the turntable to a stereo receiver’s phono jacks and the ground wire to the ground screw on the receiver. Then run the receiver’s*** tape or line out*** to the line input of your PC’s audio interface (normally the light blue mini-stereo jack on the back). You’ll need an RCA -to-mini-stereo converter cable.
line out是线路输出口，那么tape out是什么输出口呢？
网上有的叫“录音机输出”，有的叫“录音输出”，甚至还有叫“磁带输出”。不知专业说法叫什么。