Regarding AAC Quality!

Hi,
I wanted to know whether the music provided in Itunes store is AAC VBR or CBR ? if so which one is better and how does this compare with MP3 VBR And CBR? Also wanted to know whether the content provided on Itunes is ripped directly from the original music or its ripped from cds?
Please let me know thanks

Sudarsh2013 wrote:
Hi,
I wanted to know whether the music provided in Itunes store is AAC VBR or CBR ? if so which one is better and how does this compare with MP3 VBR And CBR?
Sudarsh, The songs sold in the iTunes Store are AAC/256 with CBR. Amazon MP3 uses MP3/256 with VBR, and Google Play uses MP3/320 with CBR. Most people, using typical equipment and typical listening conditions, will hardly notice a difference among them, but there may be personal preferences.
Also wanted to know whether the content provided on Itunes is ripped directly from the original music or its ripped from cds?
Usually from the masters. In some cases, special mastering techniques are used for better quality; see
http://www.apple.com/itunes/mastered-for-itunes/

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Thanks for your response mate. I've been out of town for a while so I couldn't post the links to the hearing tests (hope posting these links isn't against forum policy as well).
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http://www.soundexpert.info/coders128.jsp;jsessionid=JBBFLKCLGLAE
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http://www.soundexpert.info/coders192.jsp
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http://www.hydrogenaudio.org/forums/index.php?showforum=40&pruneday=100&sort_by=Z-A&sort_key=lastpost&topicfilter=all&st=0
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Re: REGARDING VENDOR QUALITY RATING
http://www.sap-basis-abap.com/sapqm004.htm
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2) How the standard settings, if the quality level is created manually to trigger the quality level at first attempt?
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+3) As I have explained earlier we are creating new plant, if we need to upload cutover data for quality level?
If we do not what will happen? If we need to, then how?+
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Regarding AAC Quality!

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