here's the thing

How to stream all your music from iCloud with iTunes Match

What if you could listen to your entire music library—you know, all those hundreds, or even thousands, of MP3 music files on your PC or Mac—whenever and wherever you wanted to?

Sure, you could transfer your songs to your iPhone or iPad, but not everyone has enough room on their handsets for all those tunes—especially when it comes to music lovers with a gazillion digital albums sitting on their desktop hard drives.

Enter iTunes Match, a just-launched music service from Apple that features an online, digital “locker” for all your music, which you can stream on your iPhone, iPad, or iPod Touch, so long as there’s an Internet connection handy. You’ll also be able to stream “matched” music from iTunes on your Apple TV.

Now, iTunes Match isn’t the only so-called digital music “locker” on the market; Amazon, for one, offers its “Cloud Player,” and there’s also Google Music.

iTunes Match scans all the music on your hard drive, and then “matches” them with high-quality versions that you can stream from iCloud.

But iTunes Match offers a clever feature that Amazon and Google don’t (or at least, not yet): the ability to scan the music on your hard drive, and then quickly “match” those songs with high-quality versions of each track that are already sitting on Apple’s iCloud servers.

That’s a much speedier process than uploading each and every MP3 you own to your digital music account—a chore that could take hours or days, depending on the size of your music collection and the speed of your Internet connection.

Of course, iTunes Music comes with strings attached. For starters, it’ll cost you: think $25 a year for 25,000 songs (any tracks purchased from iTunes don’t count against the limit, by the way), plus more for additional storage.

Also, while Apple has about 20 million tracks in its iCloud library, it probably won’t be able to match everything in your personal collection—and that means you probably will have to upload at least some songs to your music-locker-in-the-sky. So yes, you may still be in for a long wait, especially if you have a lot of obscure tunes on your hard drive.

And while you’re free to stream your music over your iPhone’s 3G connection, doing so will count against any data limits in your monthly wireless plan, so make sure to stream with caution. (You can also disable cellular music streaming by tapping Settings, Store on your iPhone or iPad, and then switching “Use Cellular Data” to “Off.”)

So, ready to starting scanning and matching? Here’s how to get started.

Have any questions—or problems, for that matter? Let me know; I’m still in the process of testing iTunes Match myself, so we’ll figure it out together.