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I try to use an external mic to make some audio recordings. But the level of the input is really low ! In fact, the internal build-in mac has a better input level than the external one that is closer to my mouth !

Did I miss something about audio recording ?

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up vote 4 down vote accepted

Microphones are hooked up to a pre-amp to boost the signal before recording. The internal microphone on the Mac probably has a built-in pre-amp while the external jack doesn't. Typically external mikes are connected to a sound or mixing board before hooking up to a computer.

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Indeed - so you'll either need a powered mic or some other level converter –  sdg Dec 14 '10 at 22:30

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