Audio MIDI Input - Thru greyed out?

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Level 1

9 points

Audio MIDI Input - Thru greyed out?

Hi, I'm trying to pass audio thru my Audio In port to my Audio Out port on my Macbook Pro. I am using Mac OS X and when I go to Audio MIDI Setup and set the Default Input to be Built-In Input and Properties For: Built-In Input - I want to check the Thru boxes under Audio Input but they are greyed out. Can anyone help me out? I am looking to enable this feature for both channels and have audio pass through my system.

Any help is very appreciated. Thanks!

MacBook Pro, Mac OS X (10.5.4)

Posted on Sep 13, 2008 2:45 PM

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Answer 1

Sep 13, 2008 5:32 PM in response to boarder4021

"Thru" is only for external audio devices with hardware audio pass-through. Built-in Audio Input does not support it. You need to use an application to copy the audio to the output. It can be done by Garage Band, but it is simpler with LineIn. Scroll down a bit on:
<http://www.rogueamoeba.com/freebies/>

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Answer 2

boarder4021 Author

Level 1

9 points

Sep 13, 2008 5:34 PM in response to Malcolm Rayfield

For some reason LineIn doesn't work for me anymore. It used to, but now it isn't doing it's thing. I thought the Thru thing could produce the same effect. Thank you though.

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Answer 3

Sep 13, 2008 6:36 PM in response to boarder4021

In Audio MIDI Setup, set "Properties For" to the input, and the output, and make sure they both are set to 44,100 Hz, 2ch-16bit, and the volume sliders are to the right.

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Answer 4

Nov 25, 2008 1:04 AM in response to boarder4021

Were you ever able to resolve this, or does anyone know how to resolve it????

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