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How to cut the large audio file to small file?

1690 Views 21 Replies Latest reply: Mar 11, 2012 5:17 PM by lifromclayton RSS
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lifromclayton Calculating status...
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Mar 1, 2012 9:55 PM

Hi, I found my iTunes refuse to sync my audio files into my iPhone. Then realized that thet might be too large, all around 10MB a piece. Would like to know what is the best and easy way to cut the big files into smaller mp3 files in order to mainly use them on iTunes with my iPhone 3G and Mac OS X SL,10.6.8.


Thank you very much.

iPhone 3GS, iOS 5.0.1
  • AnaMusic Level 9 Level 9 (55,065 points)

    Open iTunes... goto Help in the Menu Bar... Type in Convert to MP3 ... Select from the Topic list  Save a copy of a song in a new file format

  • Limnos Level 8 Level 8 (36,580 points)

    When syncing select "Convert higher bitrate songs to 128 kbps AAC" - - discussion from 2007  This will convert the song to a smaller format for the device.  Using this method instead of the convert format method suggested by an earlier poster means you will not end up with two copies of your music, one in the original format and the other in the smaller format.  You will only have one version actually on your computer and this will save space and clutter.


    If you do not mind having two copies: iTunes: How to convert a song to a different file format - - including information about different formats and discussion about compression.

  • ed2345 Level 6 Level 6 (18,405 points)


    Hi, I found my iTunes refuse to sync my audio files into my iPhone. Then realized that thet might be too large, all around 10MB a piece.

    Li from clayton,


    10 MB is not that large for a music file.  At the common encoding rate of 256 kb/s, 10 MB is just a 5 minute song.  People put those on their iDevices all the time.


    You can certainly convert to a lower bit rate format and try again, but be aware that you probably have some issue other than file size that is going on.

  • ed2345 Level 6 Level 6 (18,405 points)



    The easiest way to that is with an audio editor. 


    But if you want to do it with just iTunes, here is the procedure:  Right-click the library entry for the big file, Get Info, go to the Options tab, and set the Start Time and Stop Time to include the section you want.  OK to save it.  Then right click again, and choose "Create MP3 version."  This will create a new smaller file with just the portion you selected.

  • ed2345 Level 6 Level 6 (18,405 points)

    Li,  Although I haven't used it, I believe MP3 Trimmer may be able to help, and it has a Mac version.  A search would turn up information on where to get it.

  • ed2345 Level 6 Level 6 (18,405 points)

    Li,  It is possible that the MP3s created by AutoMP3Splitter have some header corruption or other minor incompatibility.


    It is also possible that they are using too low a bitrate.  10 min for less than 2 MB is probably a bitrate around 32 kbps.  Even for spoken word files, don't use less than 64.

  • ed2345 Level 6 Level 6 (18,405 points)

    Li, Just thinking about this, I'm suspicious that the problem is in the sample rate that AutoMP3Splitter is applying.


    Can you take one of the problem files (that works in iTunes but does not sync to the iPod), highlight it in the library, File > Get Info, go to the Summary tab, and report back with the "Bit Rate" and "Sample Rate" that you see there?

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