Line in是什麼意思
"Line in" is a term commonly used in audio and electronics contexts, typically referring to an input jack or connection that allows you to connect an external audio source to an audio device, such as a mixer, amplifier, or computer. The term "line" refers to a signal that is strong enough to be transmitted without the need for amplification, as opposed to a "microphone level" signal which is much weaker and requires amplification before it can be used.
Here are some examples of how "line in" might be used:
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On a mixer: A mixer might have multiple "line in" jacks, allowing you to connect multiple audio sources, such as CD players, synths, or other line-level devices.
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On a computer: Many computers have a "line in" jack that allows you to connect an external audio device, such as a microphone or an audio interface. This allows you to record or play back audio from external sources through the computer's sound system.
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On a stereo system: A stereo system might have a "line in" jack that allows you to connect another audio device, such as a CD player or a portable music player, and play the audio through the stereo's speakers.
In all of these cases, the "line in" connection is designed to accept a strong, clear audio signal that does not need to be amplified before it is processed by the audio device.