Audio Line-Input defect!

1. The Line-Input of my Macbook Pro 2.8 (late 2008) records phase-inverted! This happens with both Windows and OS X, so it seems to be happening in hardware.
2. The Realtek Windows driver shipping with Boot Camp is badly bugged. On the Input it clips everything above -12 dB hard, but only on the positive side of the waveform (negative is unharmed)! Fortunately this is fixed with the current R2.14 drivers.
This leaves the question of whether Apple has ever tested the line-input of it's shiney and expensive new Macbook Pros!?

****, the phase-inversion turned out to be the cable. You may call me stupid now!

Similar Messages

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    for me it turned out that the jack into the iMac was loose.  Once I fiddled with it everything worked okay

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    Did you see the fix for this problem and did you try it?  I use to do a lot of direct line in recording with my guitar and now I have the same problem. I won't be able to try to fix till tonight. I am in Oregon.  So I was just curious if you got a solution.
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  • Audio Line-In Input: Not Reading Sound

    So here's my problem:
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  • Audio line-in shows input, but no audio?

    I got a MyFi xm2Go player that I plugged in to my MDD's audio line-in jack with a patch cable (3.5mm to 3.5mm). I can't seem to get it to play through my MDD.
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    I'm going to change this to "answered" because thanks to this conversation I have found a solution.
    Versiontracker has a freeware program called LineIn that bridges this gap. It will let you select your audio in and out and with a click of a button labeled "Pass Thru" it plays any audio input through your audio output.
    http://www.versiontracker.com/dyn/moreinfo/macosx/18987
    Just like OS X should.
    This might be beating a dead horse, but one of the most disappointing things about the migration to OS X was these missing bits of functionality that somehow got lost in translation. I have heard the defense that since OS X is a brand new operating system from the kernel on up it's not a question of having taken something away.
    Rubbish.
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    It's clearly possible. I found a third-party non-Apple developer that did it.
    The reason I'm ranting is that I shouldn't have had to hunt for this answer or a third-party solution in the first place. This is an obvious need that Apple really should have handled for me. The "pass-through" button should have either been there, or not been necessary because line-in audio would automatically be passed through to the line-out selected.
    /rant.
    Thanks for the help, everyone. I really do mean that. I am now grooving to satellite radio through my Mac thanks to you folks.

  • Audio line-in port - input level shows sound but nothing from speakers

    I have a Genus DAB radio attached to the Audio line-in port on my Macbook running Leopard 10.5.3. The input level meter shows sound but nothing is heard through the speakers.
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    What audio application are you using to pass the audio through the input to the speakers/headphones?
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  • Audio line level input gain too high

    I've had this problem since getting my macbook 3 months ago. The line level input gain seems to be set very high no matter what & it still is too high after going into system preferences/sound & adjusting the input volume all the way down. I bought a Griffin imic thinking that might help getting around the problem, but it's just as overloading with the imic as using the macbook's built-in line input. Has anyone else experienced this? Any fixes?

    Got it fixed, defective user

  • No sound with input to audio line in

    All of my other audio works fine. I can play CDs and video files like AVI and sound is perfect. I am using the Apple pro speakers. You can't get audio from the line-in on the speaker jack either. If you go to the audio prefs it shows line in and port is audio-line in port. The input level meter shows activity that looks like the audio currently playing. If you unhook the audio cable (monaural) the sound level meter goes to zero. The output shows external speakers and port is built-in audio. I am trying to listen to the TV audio while I watch the composit video on my monitor. The video part works perfectly. It is like the audio in is not connected to the audio out. Any ideas??
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    I was a bit confused by your description of what is going on with your system, so I'm sure you;ve already done some of this stuff. Having said that, here are a few suggestions...
    1. Did you change anything in the Audio MIDI Setup application? It is located in: Applications: Utilities
    2. Did you hit the Mute button on your keyboard?
    3. Did you plug the cable into the correct port on your Mac?
    4. Did you double-check your setting in System Preferences: Audio? Input and Output?
    5. Are you coming out of the Audio Out on your sound source?
    6. Have you tried any other external audio source with success?
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  • Condenser mic through PowerMac G4 audio line-in

    I just picked up a MXL M.A.R.K. condenser mic and a Rolls Mic Power I 48V phantom power supply. I'd like to start podcasting using GarageBand. I've connected the mic to the PowerMac G4 audio line-in port and select Line-In in the GarageBand preferences. However, the mic audio is barely discernible...even with volume inputs all the way up, which of course increases the noise. Anyone have any ideas how to take advantage of this condenser mic? Is Griffin's iMic required? Does the phantom power supply appear defective?
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    Why it doesn't work:
    http://thehangtime.com/gb/gbfaq2.html#micline
    (BTW, if the Phantom Power weren't working you wouldn't get any signal from it)
    --HangTime [Will Compute for Food] B-|>

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