Apple has released iTunes 10.5.2 for Mac OS X and Windows, the update includes several bug fixes and improvements, most notably for the iTunes Match service. The description of the update is brief, but if you’re an iTunes Match subscriber and you’ve run into any problems, you should probably get the update sooner than later.

iTunes 10.5.2 includes several improvements for iTunes Match and fixes an audio distortion problem when playing or importing certain CDs.

You can download the update from Software Update, through iTunes, or directly from Apple.

If you signed up for iTunes Match and you’re seeing some peculiar icons in your music library alongside track names, don’t miss this chart put together by Apple that explains what each icon means, helping you troubleshoot the problem.

The icons include:

• Cloud with a slash through it – ineligible for iTunes Match
• X’ed out cloud – removed from iCloud
• Cloud with an exclamation point – error uploading the song
• Double cloud with a slash through it – duplicate song exists
• Empty cloud – song is waiting to be processed

Why the cloud icons anyway? Because iTunes Match is part of iCloud, of course.

iTunes Match has been launched in the USA by Apple with the release of iTunes 10.5.1. The Match service costs $24.99 a year to store your entire music library within iCloud allowing you to stream it to any iOS 5+ iPhone, iPad, iPod, Mac, or Windows PC, regardless of where your music has come from. This means music that you have ripped from your own CD’s, gathered over the course of time, downloaded from the web, or bought from iTunes, are all accessible to be streamed through the iTunes Match service.

To use iTunes Match, you’ll need to sign up for and set up iCloud if you haven’t already, then install the latest version of iTunes. After launching iTunes, you’ll see a new “iTunes Match” option under left sidebar where you can sign up for the service.

Download iTunes 10.5.1

You can get the latest version of iTunes through Software Update, iTunes Update, or by downloading it directly from Apple:

• Download from Apple.com/iTunes (no email address required just click big blue ‘Download’ button)
• (Direct download links for Mac OS X and Windows coming soon)

Apple describes how iTunes Match works as so:

Here’s how it works: iTunes determines which songs in your collection are available in the iTunes Store. Any music with a match is automatically added to iCloud for you to listen to anytime, on any device. Since there are more than 20 million songs in the iTunes Store, chances are, your music is already in iCloud. And for the few songs that aren’t, iTunes has to upload only what it can’t match. Which is much faster than starting from scratch. Once your music is in iCloud, you can stream and store it to any of your devices. Even better, all the music iTunes matches plays back from iCloud at 256-Kbps AAC DRM-free quality — even if your original copy was of lower quality.

The last point of upping the quality of songs is rather substantial, since anyone carrying a music library around for quite some time undoubtedly has many 128kbps songs in their library.

There is a limit of 10 devices and 25,000 songs to the service, although songs purchased from iTunes Store do not count against that limit.

Update: iTunes Match is now available along with iTunes 10.5.1, download it now to sign up for the music streaming and cloud storage service.

The public release of iTunes Match seems to be approaching quickly as a third beta of iTunes 10.5.1 is made available to developers. The new beta focuses on iTunes Match and includes stability and performance improvements directly related to the iCloud service. Despite Apple missing their originally planned “end of October” release date for Match, 9to5mac notes that the iTunes beta updates are coming out faster, further indicating a public release is soon.

When iTunes Match is released to the public, a subscription will cost $24.99 each year and allow for up to 10 personal computers or iOS devices to access up to 25,000 songs of an iTunes library from anywhere through iCloud. On the software side, iTunes Match requires Mac OS X or Windows, iOS 5, the newest version of iTunes, and iCloud. The yearly fee is separate from the iCloud storage upgrades, and music purchased from iTunes does not count against the 25,000 song limit.

Users can prepare for the iTunes Match service by signing up for and configuring iCloud to work on their desktops and iOS hardware. Once the Match service is made public, using the music service will then just be a matter of downloading the latest version of iTunes and paying the fee through iTunes, and then enabling the service through iOS settings.

Below are the brief attachment notes for the latest beta via 9to5mac:

iTunes 10.5.1 beta 3 is now available. This update includes a number of important stability and performance improvements for iTunes Match. iTunes Match stores your music library in iCloud and allows you to enjoy your collection from anywhere, any time, on your iPhone, iPad, iPod touch, computer or Apple TV. In order to subscribe to iTunes Match, or continue using your existing subscription, please upgrade to iTunes 10.5.1 beta 3. Once upgraded, turn on iTunes Match on each of your computers and iOS devices. On your computer, choose Store > Turn on iTunes Match. On your iOS device, tap Settings > Music, then turn on iTunes Match. On your Apple TV, please turn off iTunes Match under Settings > General > iTunes Store. The songs on your computer should not be affected. As always, please backup regularly and do not delete the music you add to iCloud from your computer.

The first beta version of iTunes Match has been released for developers to subscribe to. The service stores an entire music library within iCloud and allows you to stream or download your music from anywhere, including iPhone, iPad, iPod touch, a Mac, or even Windows PC. This is done without uploading files, instead iTunes Match scans your library and matches it within the iCloud service, even providing the music at a higher bit rate in the process.

To use iTunes Match beta, developers need the latest version of iOS 5 beta and iTunes 10.5 beta 6.1. Despite being a beta release, iTunes Match service costs $24.99 per year, but dev users will receive an additional 3 months of free service in addition to their 12 month plan. The cloud storage capacity of an iTunes Match library is separate from whats included in the iCloud plans, which makes the price even more competitive.

Those who aren’t developers will have to wait for iCloud and iTunes Match to be released alongside iOS 5 this fall.

You can watch two video walkthroughs below of iTunes Match beta in action:
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