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Topic: Protected AAC

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FairPlay

Jon Lech Johansen

Jon Johansen

Playfair

Advanced Audio Coding

	AAC FAQ - Hydrogenaudio Knowledgebase
		AAC is the culmination of the current state of the art audio encoding techniques.
		Guruboolez's last test concluded that Nero AAC was the best AAC encoder, at 128kbps, on classical samples, at the time the test was conducted.
		Gapless playback is not part of the AAC standard and as such is not mandatory.
	wiki.hydrogenaudio.org /index.php?title=AAC_FAQ (836 words)

	[No title]
		AAC was declared international standard by MPEG by the end of April 1997.
		AAC files purchased from the store are not exportable, but can be burned to as many audio discs as you want, only having to change their play order every 10 burns.
		AAC files you burn yourself can be exported and playlists burned as many times as you want.
	linuxmafia.com /faq/mp4 (3293 words)

	FairPlay - Wikipedia, the free encyclopedia
		The protected track may be copied to any number of iPod portable music players.
		The protected track may be played on up to five (originally three) authorized computers simultaneously.
		The protected track may be copied to a standard Audio CD any number of times.
	en.wikipedia.org /wiki/Protected_AAC (1892 words)

	TiVo Still Lacks AAC Support
		AAC (Advanced Audio Coding) is a proposed standard for audio developed by a consortium of companies including Dolby Labs, renowned for 'Dolby Stereo' and 'Dolby Surround Sound'.
		AAC is the emerging standard for its superior quality, digital rights management (DRM) and small file size ideal for Internet, wireless, and digital broadcast arenas.
		AAC provides audio encoding that compresses much more efficiently than older formats such as MP3, yet delivers quality rivaling that of uncompressed CD audio.
	www.methodshop.com /gadgets/tutorials/tivoaac/index.shtml (1520 words)

	boycott-riaa.com - Article: How FairPlay Works: Apple's iTunes DRM Dilemma
		AAC was developed by some of the same audio experts that created the original MP3 standard: the Fraunhofer Institute, Dolby, Sony, and AT&T. It was adopted as an open standard a decade ago this year, although it has been updated and expanded since.
		To play a protected AAC song, iTunes uses the matching user key to unlock the master key stored within the song file, when is then used to unscramble the song data.
		Because protected AAC songs are scrambled with an encrypted master key, it is practically impossible to unscramble protected song files.
	www.boycott-riaa.com /article/21332 (3616 words)

	AAC on non-iPod players? \| Ask MetaFilter
		AAC is a standard, but not an open standard.
		However, the protected AAC sold through the Apple iTunes Music Store is only supported by three devices: the Apple iPod, Apple iTunes, and the Motorola Rokr phone.
		The protected AAC is essentially an unprotected AAC file wrapped in a DRM layer.
	ask.metafilter.com /27644/AAC-on-noniPod-players (2010 words)

	AAC Definition
		AAC, especially MPEG-4 AAC, provides greater compression and better sound quality than MP3, which also came out of the MPEG standard.
		AAC is the default format for Apple's iPod.
		AAC is available in profiles, which determine how the algorithms work to encode the audio data.
	www.pcmag.com /encyclopedia_term/0,2542,t=AAC&i=37312,00.asp (744 words)

	Breaking Down Barriers
		AAC users come to the arena of relationships and sexuality from various life experiences and may experience increased vulnerability because of lack of exposure about what constitutes healthy versus unhealthy relationships, along with setting boundaries in relationships, etc.
		This need to protect stems from the belief that people with disabilities are 'child-like' and are not able to make responsible decisions about their options and their choices.
		Some of the AAC users in the Speak Up project informed us that they had few experiences with relationships, and some had significantly limited social network of friends within their lives.
	www.aacsafeguarding.ca /resources-break_dwn_barrier.htm (810 words)

	TiVo Still Lacks AAC Support
		AAC (Advanced Audio Coding) is a proposed standard for audio developed by a consortium of companies including Dolby Labs, renowned for 'Dolby Stereo' and 'Dolby Surround Sound'.
		AAC is the emerging standard for its superior quality, digital rights management (DRM) and small file size ideal for Internet, wireless, and digital broadcast arenas.
		AAC provides audio encoding that compresses much more efficiently than older formats such as MP3, yet delivers quality rivaling that of uncompressed CD audio.
	methodshop.com /gadgets/tutorials/tivoaac/index.shtml (1391 words)

	Advanced Audio Coding - Wikipedia, the free encyclopedia
		AAC was designed as an improved-performance codec relative to MP3 (which was specified in MPEG-1 and MPEG-2) by the ISO/IEC in 11172-3 and 13818-3.
		AAC is a wideband audio coding algorithm that exploits two primary coding strategies to dramatically reduce the amount of data needed to represent high-quality digital audio.
		AAC, which was first specified in the standard known formally as ISO/IEC 13818-7, was published in 1997 as a new "part" (distinct from ISO/IEC 13818-3) in the MPEG-2 family of international standards.
	en.wikipedia.org /wiki/Advanced_Audio_Coding (1988 words)

	FS2 + Traktor 2.6 Protected AAC compatibility - NI Forums
		Can't see any mention of the words protected or non-protected in the Final Scratch 2 details, but I assume if Traktor can't read them then this means that the new version of FS also won't play anything purchased through the iTunes store.
		The reason that NI is having difficulties with protected AAC files, is due to Apple's licensing agreement with labels.
		There were one or two programmes available as free downloads that removed the copy protection from m4ps (JHymn for example) which would have enabled you to play iTunes downloads in Traktor and FS but with the advent of iTunes 6.0 these programmes no longer work.
	www.native-instruments.com /forum/showthread.php?t=21784 (488 words)

	Dell DJ Site - AAC files from iTunes?
		Protected AAC files are what you get when you download from ITMS.
		Okay, Easy CD-DA Extractor may or may not be able to convert protected AAC files, but they are the only converter that I was able to find that could convert aac files into such a variety of formats.
		Is that the extension of the protected AACs??
	www.delldjsite.com /forums/showthread.php?t=1770 (1188 words)

	O'Reilly -- Free Your Music: How to Convert Digital Audio Files
		However, the same extension is sometimes used for entirely different formats, as is the case with Apple's lossless format and the AAC format used by the iTunes music store.
		In other cases, such as with AAC, different extensions are used, depending on which program created the file and whether the file is copy-protected.
		AAC can provide similar quality at 128kbps, which means the files will take up approximately 33% less space.
	digitalmedia.oreilly.com /2006/02/08/how-to-convert-digital-audio-files.html (815 words)

	Protected AAC Files and Traktor - NI Forums
		After talking with tech support they say to move all the protected AACs (that I downloaded from iTunes music store) meaning, "dont use them." Well, I have a lot of these files, all of which I want to use in FS2.
		The reason I am waiting on doing them as AAC is because of the posts I read about noise at the beginning of AAC tracks in Traktor.
		This lets you re-scrub to AAC when NI gets their problems fixed, and (more importantly) protects your iTMS investment - Apple has in the past and probably will again in the future be able to detect "scrubbed" files and render them unplayable.
	www.nativeinstruments.de /forum_us/showthread.php?t=26240 (616 words)

	Music Man Tutorial - How to convert MP3, AAC, M4B, Ogg Vorbis, WAV, WMA, MIDI, Audio CD, AIFF to M4A on Mac OS X using ...
		While AAC must be licensed on a per application basis on the Windows operating system, there are no license requirements for using AAC in applications on Mac OS X. There are file extensions used - M4A, M4P and M4B.
		Unprotected AAC uses the extensions.m4a and.m4b, protected AAC uses the extensions.m4p and.m4b.
		Protected AAC (M4P, protected M4B) can be played on your computer using music player software such as Music Man. Protected AAC (M4P, protected M4B) CANNOT be converted to other formats.
	www.mireth.com /wt/mpme-convert-m4a-mac.html (488 words)

	iTunes' Protected AAC cracked? - Hydrogenaudio Forums
		The original developer of DeCSS has created a utility for intercepting the decrypted AAC in the QuickTime DLL - they say a utility for doing this already exists, but this time, the source code is in the open.
		This is perfectly legal in both Denmark and Norway; circumventing copy protection solely for the purpose of playback is not against the EU directive - at least not the way the Danish Ministry of Culture interprets it.
		The file is RAW AAC, you can convert this to ADTS AAC with faad2 (-a option), then convert it to MP4 using mp4creator or the winamp plugin.
	www.hydrogenaudio.org /forums/index.php?showtopic=15598& (1293 words)

	MacDailyNews \| Sony bows to Apple with plan for AAC format compatibility
		AAC was developed by the MPEG group that includes Dolby, Fraunhofer (FhG), AT&T, Sony and Nokia—companies that have also been involved in the development of audio codecs such as MP3 and AC3 (also known as Dolby Digital).
		AAC 'is simply a better approach to digital sound encoding' than MP3 - July 01, 2003
		We were always aware that AAC was not a audio format owned by Apple as WMA is by M$.
	macdailynews.com /index.php/weblog/comments/9514 (2417 words)

	How FairPlay Works: Apple's iTunes DRM Dilemma
		The earlier MP3 file format had no provision for DRM. However, the newer AAC format was designed with an open mechanism for companies to extend the format using their own DRM implementation.
		AAC was developed by some of the same audio experts that created the original MP3 standard: the Fraunhofer Institute, Dolby, Sony, and ATandT.
		The AAC song itself is scrambled using a separate master key, which is then included into the protected AAC song file.
	www.roughlydrafted.com /RD/RDM.Tech.Q1.07/2A351C60-A4E5-4764-A083-FF8610E66A46.html (3454 words)

	AudioCoding.com - Knowledge Base (Site not responding. Last check: 2007-11-07)
		AAC means "Advanced Audio Coding", and in the beginning it was also called MPEG-2 NBC for "Non-Backwards Compatible" as opposed to the MPEG-1 and MPEG-2 BC (with 5.1 channels) standards.
		This became more obvious with the standardization and implementation of HE AAC / aacPlus, as the older extensions were also aiming at a higher coding efficiency for low bitrates, but mostly for special purposes like speech coding.
		Transparent quality is possible which means that most of the test samples are indistinguishable from the original for most of the listeners (term defined by the EBU in 1991 and statistically implemented in their formal listening tests since then).
	www.audiocoding.com /modules/wiki/?page=AAC (1519 words)

	MacSlash \| Where Are The Third Party Devices To Play iTunes AAC Files?
		None of the cool devices that can play your iTunes library seem to be able to play the Fairplay protected AAC files purchased from the iTunes store.
		Rogue Amoeba's Nicecast [rogueamoeba.com] is able to stream protected AAC songs to your squeezebox.
		AAC only got exposure with the iPod, no one gave a damn about it before then.
	www.macslash.com /article.pl?sid=04/03/09/165258 (1597 words)

	Convert iTunes to MP3 Format
		If you burn a cd of AAC tracks and then convert them back to mp3's you will definately experience a loss in quality because you are going through two conversion processes (1.
		Instead of knocking Apple and DRM and protected songs and what a pain it is, remember it is not Apple forcing those restrictions, its your friendly record company and music publishers.
		AAC files are not necessarily restricted, but are capable of restrictions (DRM).
	askbobrankin.com /convert_itunes_to_mp3_format.html (8491 words)

	Mac Rumors: iTunes Music Store Digital Rights Summary
		Apple introduced their new iTunes Music Store which features AAC formated files available for download.
		First word of Apple's work on this technology with respect to MPEG4 (AAC) was in a PCPro.co.uk article in February of this year.
		- Transcoding from Protected AAC to MP3/AIFF from iTunes is prohibited by iTunes.
	www.macrumors.com /2003/04/29/itunes-music-store-digital-rights-summary (702 words)

	Protected Data Software: Secret Explorer, Protected Storage Explorer, Xintegrity, ...
		Xintegrity can automatically create protected backup files [optionally encrypted with 256 bit AES] allowing you the option of restoring the file when modification is detected.
		Protected Music Converter is a software which allows you easily convert your protected music files to most frequently used unprotected formats (MP3, OGG, WMA, WAV).
		The protected parts of code are executed on the virtual machine, which makes it really difficult to analyze and crack the protected program.
	www.criticalfiles.com /free/protected-data (753 words)

	Jon develops new utility to decrypt iTunes DRM tracks (Site not responding. Last check: 2007-11-07)
		Now he has written code under the project name 'playfair' to allow iTunes users to decrypt their purchased AAC files.
		The resulting decrypted AAC file may be used as with any other AAC file including the use of other AAC compatible players or transferred to another computer.
		It promises to keep the hackers busy: a patent application published last July indicates that Apple is brewing its own DRM, which it may or may not share with the industry.
	www.cdfreaks.com /news2.php?ID=9469 (465 words)

	Remove Protection of AAC audio files [Archive] - The macosxhints Forums
		A side effect of all this is that iTunes reports all.m4b files as being Protected AAC, even though the contents of your homemade.m4b files are not actually encrypted.
		AAC (AKA m4a) quality at 128k is significantly better (ie audibly) better than either MP3 or WMA at the same bitrate - I'd say AAC is near transparrent, while the other two formats are deffinately not at that bitrate.
		Re protection, what I do find unforgivable is that if you buy music from iTunes, then burn it to an audio CD, I can't then re-import it into iTunes (5) as unprotected AAC files.
	forums.macosxhints.com /archive/index.php/t-44181.html (1852 words)

	Opinion: HP's iPod Moves Could Hurt the Industry
		But the Apple iTunes Music Store sells songs only in the more limited Protected AAC format, which is compatible only with iTunes and the iPod, giving Apple the type of corporate lock-in for which Microsoft is often (and, in the case of digital media, unfairly) criticized.
		It might be better for us all to switch to the proprietary Protected AAC format (note: Not a standard) that Apple uses and licenses to no other companies, rather than WMA, which is licensed for use on over 500 devices.
		In fact, AAC files purchased from Apple are available for use in a wide variety of software programs — because they're tied not to iTunes, but to the QuickTime media framework.
	www.windowsitpro.com /Articles/Index.cfm?ArticleID=41446&DisplayTab=Article (2336 words)

	AAC - Mac Guides
		AAC (Advanced Audio Coding) is a lossy compression audio codec which has become popularized by Apple QuickTime.
		It also has a protected format, under Apple's FairPlay digital rights management (DRM) with the.m4p (p = protected) extension.
		The iTunes Music Store (found in iTunes 4 and above) features protected AAC files (.m4p) which are available for download at US$.99 a song for 128 kbps bitrate.
	guides.macrumors.com /AAC (186 words)

	No More Conversion Of Protected AAC? \| iPoding \| What's that in your pocket?
		Soon after Apple began using protected AAC files for iTMS downloads a workaround was found which allowed those files to be converted to MP3s.
		This allowed the songs to be playable on devices without AAC support.
		I'd use Amadeus II from time to time to transfer AAC ITMS tunes to MP3 for...
	www.ipoding.com /modules.php?op=modload&name=News&file=article&sid=1779 (263 words)

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