"Compress" option in Finder .. Do you lose any quality?

Discussion in 'macOS' started by lip5016, Oct 7, 2014.

  1. lip5016 macrumors regular

    Joined:
    Jul 11, 2014
    #1
    Hello. I'm just wondering about the "Compress" option when you right-click anything in the "Finder".. I know that it makes a (.zip) file of whatever you select..

    Does this compression cause any reduction in quality? I have a TON of (.wav) and (.mp3) libraries that I would like to compress for storage purposes, but it is extremely important that there will be no loss in sound quality or file integrity..

    Thoughts?
     
  2. Alrescha macrumors 68020

    Joined:
    Jan 1, 2008
    #2
    No, you do not lose quality

    The compress option in Finder uses (as you have determined) Zip file compression which is lossless. See:

    https://en.wikipedia.org/wiki/Zip_(file_format)

    You are thinking about audio file compression where clever algorithms shrink a file but try to make it sound the same.

    A.
     
  3. mfram macrumors 65816

    Joined:
    Jan 23, 2010
    Location:
    San Diego, CA USA
    #3
    Yes, zip file compression is lossless. But it may not do a lot of good. WAV files are compressible. But mp3 and video are usually not very compressible with zip. If you have a lot of mp3 and video files, you aren't likely to save much disk space.
     

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