No audio input? Really?

Ok start of a rant here, but just want to make sure I understand, there is no audio input for my brand new Macbook Pro Retina? I need to buy a USB adapter? What kind?
Searchingn for "audio ports" in the Mac Help, I'm told to "Find the Manual" for my Mac. But there is no manual. Apple's instructions:
Choose Apple menu > About This Mac, and then click More Info.
Click Support.
In the Macintosh Resources section, click User Manual.
The user manual for your Mac is displayed in a browser window.
But the user manual does not appear in the browser window. Instead links to every product appear (iPhone, iPad, etc.), and it's really hard to find the one for my product. And then the only manuals I can find are Quick Start Guides, which have nothing about audio inputs.
Why does Apple make things so hard?
Scott

FCP 7 is no longer in apples update lists so there is a chance that it has issues with the newer hardware (thunderbolt). I would guess there must be a firewire 800 PCIe card that could be used via a thunderbolt doc but how fcp is going to behave with it remains to be seen. Also FCP should not be able to take advantage of the retina display for the reason above.
Of course someone with such a macbook pro and fcp could always jump in this thread and clarify matters for all.
Good luck

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Perfect recordings on the 27" iMac and the Mac Pro. This is in addition to my own 24" iMac.
The same problems - dropped connection, crackly noise, shifts in pitch, and repeated phrases - in two 17" MacBook Pros and one 15" MacBook Pro. This is in addition to the two 15" MacBook Pros that I have tried at home.
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Thanks,
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What a great job! I've been enjoying making very amateur "audiobooks" for a young grand-daughter recently (simply using a USB mike plugged into one of the MBPs) and emailing her mother the results. Its a great way of remembering old childhood favourites and inflicting them on (whoops, I mean 'enhancing the education of" ) the next generation. Very amateur, but she really enjoys them, I gather. Doing it for real must actually be quite a buzz.
A couple more passing thoughts on the original topic. I guess you will have worked through such things, but does it make any difference whether the MBP is running from power or from battery? The "power in" section of the MBP is located pretty close to the optical port circuitry and might contribute to interference, I guess.
Another possibility might even relate to the proximity of the Mac power adaptor or the computer itself to the other equipment. Have you tried hooking it up to different power outlets, increasing distance between the power block or the computer and the other gear, introducing some shielding, etc etc.
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Cheers
Rod

No audio input? Really?

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