sound quality of MP3 CDs...

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  • Reply 21 of 23
    randycat99randycat99 Posts: 1,919member
    I ask only because I am putting together an experiment. I am going to take 3 different music tracks and do the following to each of them:



    1. AIFF reference sample

    2. encode to MP3 at 100-ish kb/s, vbr

    3. encode to MP3 at 100 kb/s vbr, convert back to AIFF, repeat 30x

    4. encode to MP3 18 kb/s vbr



    So each parent track will have 4 child versions derived directly from the parent.



    Then I am going to rip them all to CD (AIFF format), play them on my decent stereo system, and see if I can hear anything obvious. I like low distortion, full-balanced frequency spectrum, and good dynamics. So while I'm not anal about my sound, I am moderately discerning. If it sounds like an old tape cassette, I *will* notice.



    The first track I have already started work on is a Hip-hop/R&B sort of track from Genuwine's Bachelor CD. The 2nd track will be classical music- I'm thinking of the Nutcracker Suite off of a Telarc CD. The 3rd track will be some mainstream pop with lots of high frequency articulation.



    So I am eager to see how this works out in the end. The only thing I would like to get more feedback on is the #4 version. Is 18 kb/s still not low enough? Is it essential to get to single digit kb/s, or is 18 typically low enough to cause most people hesitation over potential SQ.



    [ 08-29-2002: Message edited by: Randycat99 ]</p>
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  • Reply 22 of 23
    [quote]Originally posted by Randycat99:

    <strong>The only thing I would like to get more feedback on is the #4 version. Is 18 kb/s still not low enough? Is it essential to get to single digit kb/s, or is 18 typically low enough to cause most people hesitation over potential SQ.



    [ 08-29-2002: Message edited by: Randycat99 ]</strong><hr></blockquote>



    the vorbis site has a <a href="http://www.xiph.org/ogg/vorbis/listen.html"; target="_blank"> comparison page</a> of low bitrate samples at 64 and 40 kbps in a range of formats. I would say these are cassette tape or AM radio quality. If you want it real ugly then you'll have to go lower.
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  • Reply 23 of 23
    randycat99randycat99 Posts: 1,919member
    Well, if 40-64 is a low enough value to get "tape cassette ugly", I'd say 18 ought to be ugly enough for my test. <img src="graemlins/hmmm.gif" border="0" alt="[Hmmm]" />
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