mpeg4 AAC vs. CDs?

Discussion in 'Music' started by Ben LG, Oct 23, 2003.

  1. Ben LG

    Ben LG Stunt Coordinator

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    I was checking out apple's itunes site and came across this:

    AAC compressed audio at 128 kbps (stereo) has been judged by expert listeners to be “indistinguishable” from the original uncompressed audio source.*

    Assuming that I am able to get itunes installed without crashing midway on XP [​IMG], is the quality of the songs on these new p2p pay services really “indistinguishable” from CDs if I were to burn them onto a CD-R?
     
  2. Kevin C Brown

    Kevin C Brown Producer

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    AAC is a compression scheme that is big in Japan. But it is still lossy compression. One person's *opinion* might be that it is indistinguishable from CD, but I guarentee that with the right components and source material, you *will* hear a difference. [​IMG] 128 kbps vs LPCM at about 1400 kbps. Easy to do the math. Greater than a 10:1 reduction.
     
  3. RobBenton

    RobBenton Stunt Coordinator

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    It is as good as it gets at that low of a bitrate but on a good system with a half way decent ear for music you will notice a difference.
     
  4. Kevin C Brown

    Kevin C Brown Producer

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    RB- I don't know a lot, but do you think a good MP3 codec could beat AAC?

    I was always mystified why Sony didn't try to push ATRAC more for compressed audio (other than MD). For similar rates of data reduction, I think it it is a nice compression scheme. I have directly compared ATRAC 4.5 (type R) vs CD, and it was really tough to spot the differences. Can't remember the data rate though.
     
  5. Thomas Newton

    Thomas Newton Screenwriter

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    MiniDisc ATRAC runs at about 280 Kbps, give or take.

    The LP2 and LP4 modes on newer MD models use "ATRAC3" at lower bit rates.
     
  6. RobBenton

    RobBenton Stunt Coordinator

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    No mp3's are not nearly as good as atrac. A 128kb mp3 will sound much worse then a 128kb atrac file.. at higher bitrates though the differnce is less noticable.
     
  7. ElevSkyMovie

    ElevSkyMovie Supporting Actor

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    AAC is MPEG layer 4 audio (MP4), correct? So AAC will obviously be better than MP3.
     
  8. Seth_L

    Seth_L Screenwriter

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  9. ElevSkyMovie

    ElevSkyMovie Supporting Actor

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    I came to that conclusion because the codec was developed 10 years after mp3. If it wasn't better, why create and release it?
     
  10. Seth_L

    Seth_L Screenwriter

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