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Listten to the line-in input Apps
I couldn't work out any easy way to listen to the line-in input on my MacBook; GarageBand was being slow and obnoxious, and searching here for hints didn't yield anything either.

Google helped me find a neat little application though: LineIn by Rogue Amoeba. It's free on their freebies page.
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Listten to the line-in input | 7 comments | Create New Account
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Listten to the line-in input
Authored by: robleach on Oct 13, '06 09:09:17AM

This is a good one. In 10.2.x you used to be able to do this without a third party app (such as LineIn) using one of the midi app's preferences that came with the OS, but since 10.3, that feature/app has been gone. I've used LineIn since then to be able to record radio which I plug into the mic slot. It's annoying though that you have to have an app in the doc to do this where as in the past, when you changed the preference in the midi app, it applied globally and you could quit the app and it would still work. This is really something I I think should be in the system audio preferences!



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Listten to the line-in input
Authored by: beepotato on Oct 13, '06 10:38:12AM

You don't need a third party app. The preference you're talking about is still there, in the Audio MIDI Setup application (in the Utilities folder).
In the Audio Input section (lower left corner of the window), there is a table showing the settings for each channel of the selected input. In this table, there is a Thru column, with a check box (enabled only for the Master channel) to do what you want.

MacOS X v10.4.8, Audio MIDI Setup v2.1



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Listten to the line-in input
Authored by: osxpounder on Oct 13, '06 10:45:45AM

On some systems, including my all-stock MBP, the check boxes to which you refer remain greyed out, unchangeable, and therefore LineIn is a useful solution for my machine.



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Listten to the line-in input
Authored by: robleach on Oct 19, '06 11:41:31AM

My "thru" checkbox is greyed out - always has been since 10.3.x. Do you know how to ungrey it? It's not greyed out on my 10.4 machine at work.

Rob



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Listten to the line-in input
Authored by: kkL on Oct 13, '06 01:00:28PM

I use it to share speakers between two macs.

Works fine, except I have to change sound input in System Preferences before talking on Skype (it looks like a bug, but it's harmless).



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This functionality is included already
Authored by: gostcoder on Oct 14, '06 04:26:16AM

On MacOS X 10.4.8 on an iBook G4, simply open Audio MIDI Setup.app ( found at /Applications/Utilities/Audio MIDI Setup.app) and click the "Thru" checkbox in the listbox on the lower left. I've heard others say that this feature isn't available for them, but it works for me on 10.4

There's also a great freeware app called "Audio In" ( listed on VersionTracker.com) which is mainly a simple audio recording program, but it also support Play Through and display a live waveform of the input device.

I find it quite handy for recording live shows, then I use a program like Garage Band or Audacity to split up the recording into tracks. Works great for making live CDs of local bands I've worked with.



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Needed for new Macs
Authored by: Grommet on Oct 15, '06 01:53:18PM

As osxpounder posted above in response to another nay-sayer, "On some systems, including my all-stock MBP, the check boxes to which you refer remain greyed out, unchangeable, and therefore LineIn is a useful solution for my machine."
My stock MacBook has the boxes greyed out as well. I've had LineIn installed since I got the new Mac, since even on a beast of a machine like this it can be a pain to open GarageBand. It's still pretty bloated.



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