full-scale voltage of MacBook

edited December 1969 in SignalScope Pro
Hello  :-D

i want to measure the maximum output voltage from a MP3-Player with my MacBook 2 GHz. Do you know the full-scale voltage of this Computer-Audio-Input?

Thanks ...


  • On the original 17-inch MacBook Pro, the full-scale voltage is 4.4 Volts.  Apple's hardware tech notes for developers suggest that the MacBook uses different circuitry, so your full-scale voltage may be different.  If you have an AC voltmeter, you can use it to calibrate your MacBook's built-in audio input.  Of course, your calibration will only be as precise as the voltmeter you use.

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