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Mp3 = Cda?

Discussion in 'Multimedia' started by technaught, Jul 23, 2006.

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  1. technaught

    technaught Banned Thread Starter

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    It's all in the title...

    Is MP3 format the same format that plays in your car's cd player?


    What's the difference?
     
  2. Squashman

    Squashman Trusted Advisor

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    NO. You card cd player would have to be MP3 capable to play MP3 files. MP3 files are a compressed format of the original song. They take up alot less space then a normal CDA file.
     
  3. technaught

    technaught Banned Thread Starter

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    Thanks, squash...

    Download of the material is $45 (bible study material, in MP3 format). How much time would be required to burn the download to disc in cda format?


    Just checked...

    can't d'load w/ dial-up:(
     
  4. thecoalman

    thecoalman

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    MP3 shouldn't be unless they have used a ver high bitrate or the material is very long timewise. You can burn the MP3 to CDA format.
     
  5. technaught

    technaught Banned Thread Starter

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    It's a 5 year :)30 minute/weekday) program. Probably 200G, or more.
     
  6. kiwiguy

    kiwiguy

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    Dial-up is typically about ~5 kiloBytes a second data transfer.

    Thats ~300 KiloBytes a minute, ~18 MegaBytes an hour.

    Thats ~56 hours per GB, or ~11,200 hours for 200 GB

    Around about a year of full-time dial-up.....if you are optimistic, or likely longer in reality.
     
  7. technaught

    technaught Banned Thread Starter

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    Since the download of the :30 minutes x 5 days x 5 years is compressed, what does that equate to in connection time? 25 hours? 50? 100? Approximately?

    I have the option of logging on to the local library's wireless server (public access), but that's time consuming also...
     
  8. thecoalman

    thecoalman

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    Depends on what bitrate they compressed it at. Typically 128kbs, a little more than double what your 56k modem can download at, so for every minute of audio you would need to download for two minutes. That's if your getting the full 56k which is never the case, so it's more like 3 minutes... With 200 GB's you're still looking at 20GB compressed.

    Even with a really good cable connection 20GB's would still take about 18 hours. I typically get speeds of about 300K a second. My line speed is actually faster and will go as high as almost 600K but most servers won't serve the files as fast as I can download them... Amazing the speed difference between dial-up and cable though huh? :p
     
  9. kiwiguy

    kiwiguy

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    An MP3 file is compressed as you say, but that means its unable to be further compressed by the download process.

    Typical MP3 files will "expand" about 10 times when converted to .CDA.
    But if the 200 GB you have quoted is already in MP3 format, its going to be 200 GB.

    If its 200 GB in ".CDA" format that has been converted to MP3, its about 20 GB in MP3 format(depending on the bitrate it was compressed to).

    If the site where it's available can be linked here, we could have a look and better advise.
    A fair bit of guessing on our part otherwise.
     
  10. thecoalman

    thecoalman

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    Yes, I guess he didn't make that clear... The 20 GB's we (guess we posted at the same time) mentioned is an example of what you could expect if the CDA audio has been compressed to a 128kbps MP3.
     
  11. technaught

    technaught Banned Thread Starter

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    Thanks, kiwi...

    Here's the site link. Scroll down, and file sizes are indicated for each book. They recommend hi-speed d'load only.

    http://www.thruthebible.org/site/c....tudy_Notes__Outlines_by_Dr_J_Vernon_McGee.htm

    Would this not be possible with dial-up? The only other option is logging on to the public library's wireless AP...
     
  12. technaught

    technaught Banned Thread Starter

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    You were close, coal.

    I'm on the library server (wireless AP) right now.

    Genesis is a 260 meg zip file. It took 37 minutes to d'load, at 125 kbs. Dialup would probably take a little longer, huh?:rolleyes:
     

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  13. kiwiguy

    kiwiguy

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    Yep. Think 15 to 20 hours for that folder....

    The library transfer rate of 125 kB (kiloByte) which is a 1 Mb(megabit) connection would mean that the dial - up would be 25+ times slower on average.

    The files inside the 'zip' folder are all compressed MP3 files. Zipping does not make them smaller, it just puts them all in the same folder for convenience.
     
  14. lister

    lister

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    'Technically' the audio data on a CD is in PCM format, cda files are like shortcuts to this data; and contain no audio data themselves.
    A wav file would be the closest (as it can contain PCM data) to the original.
     
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