How to cut the large audio file to small file?

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

Posted on Mar 1, 2012 9:55 PM

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21 replies

Mar 2, 2012 5:38 AM in response to lifromclayton

When syncing select "Convert higher bitrate songs to 128 kbps AAC" - http://forums.macrumors.com/showthread.php?t=303772 - 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 - http://support.apple.com/kb/HT1550 - including information about different formats and discussion about compression.

Mar 2, 2012 4:19 PM in response to lifromclayton


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.

Mar 7, 2012 7:33 PM in response to lifromclayton

Li,


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.

Mar 8, 2012 6:37 AM in response to ed2345

Thank you very much. I just down load a free software called AutoMP3Splitter. It was able to cut all the files into 10min long/1.88MB. It played in iTune on the Mac very well but again the iphone just refused to take any in when Sync. Is that possible the labels of those files should be in certain format/pattern?


Actually, the iTune showed Sync possess in that indication bar but they simply just don't show up in the iphone/Don't know where they went.

Mar 9, 2012 1:42 PM in response to lifromclayton

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?

Mar 10, 2012 4:12 AM in response to lifromclayton

Li,


Don't try to change the 24 kbps files into anything. Instead, start again with the original (big) file and make new small ones.


If your splitter program has settings that allow this, you can use it.


Otherwise, use the iTunes technique that I mentioned before. If you are going to use iTunes, then before you start, go into your Import Settings, choose MP3 Encoder with Custom setttings, and set Bit Rate to 64.

Mar 10, 2012 2:45 PM in response to lifromclayton

Li,


Glad you are finding it useful.



My original files are 24kbps. So can I use the iTune tech to do what you had instructed and go for 64kbps?


Yes. In the iTunes method, you need to set the bit rate and sample rate in preferences in advance. In the Import Settings, choose "MP3 Encoder" and then a "setting" of "Custom." This brings up a dialog where you can request a Bit Rate and Sample Rate. Save your settings. Then, any time you use "Create MP3 Version," you will get output with those settings.


Do a few files to start, make sure they sync properly, and when you are convinced that all is working well, do the rest that you need.


When you are done with this project, put the Import Settings back to normal, as the ones you will be using for your spoken-word files will be way too low for decent music quality.

Mar 10, 2012 8:52 PM in response to ed2345

I made it!!! I am able to convert the files to 64kbp and stereo and sync into iPhone. I am so so so happy!

Thank you so very much. You saved my life. Really appreciated.


Now I have to go rest and tomorrow will convert, split, organize and sync all of them, that will be around 37x10 file. The Splitter is very easy to use but they only cut one big files into 3, maxim, so need to do the double cuts.


I could not say enough thank you.


Li

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How to cut the large audio file to small file?

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