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10.6: Trim Music Files in QuickTime X Apps
Snow Leopard only hintIf you're like me, you hate paying for software that does things that you think your computer should be able to do for free.

One day after I got Snow Leopard, I really need to trim a music file for my phone, to create a ringtone. I knew Quicktime X could trim movie files, but I didn't know about music files. So I opened the music file in QuickTime X, clicked Share » Trim, and saw the command was available. So I trimmed the file and went to save it, but QuickTime X didn't have an mp3 option (or any other sound extensions), so I exported it out and changed the file extension to .mp3 in the Finder.

Also, if you do this with an extension other than mp3, remember you must use the same extension before you trimmed it.
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10.6: Trim Music Files in QuickTime X | 9 comments | Create New Account
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10.6: Trim Music Files in QuickTime X
Authored by: subtlecoolness on Apr 19, '10 09:38:58AM

You don't have to go out to QuickTime X to trim an mp3 file. You can do it in iTunes.

Do Get Info on the file you want to trim, then on the Options tab set the Start Time and Stop Time to where you want to trim the file. Click OK to save the options. Then on the Advanced menu, choose Create MP3 Version. A new file is created that is trimmed to what you set in Start Time and Stop Time.



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Not a good hint
Authored by: Typhoon14 on Apr 19, '10 10:26:38AM

I'm assuming you just saved it as a "movie" and renamed the file. This is not a good idea. The output is MP3 audio encapsulated in a quicktime movie container, and changing the filename does nothing to change this. Any application not capable of reading the quicktime container format will not be able to play the resulting file. So now you have an MP3 that is no longer a real MP3; some devices and applications may play it just fine, while others will balk. I definitely do not recommend doing this.



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10.6: Trim Music Files in QuickTime X
Authored by: robleach on Apr 19, '10 10:53:07AM

Why not just trim it in iTunes? I do it all the time. Select the song, type command-i, click the options tab, enter the time indexes for start and stop, then Go to the Advanced menu and select "Create MP3 Version". It will compress based on the settings for import you have in iTunes preferences. It's not as user-friendly as having a slider to adjust the start and stop like in quicktime, but you can be very precise with a little effort (which I'm not sure you can do in quicktime - anyone?).

Rob



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10.6: Trim Music Files in QuickTime X
Authored by: kylegeek on Apr 19, '10 12:48:12PM

I understand that iTunes and do this, but for me its easier to listen to the song and move around the slider.



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10.6: Trim Music Files in QuickTime X
Authored by: poenn on Apr 19, '10 04:10:32PM

Simply renaming a file’s extension is a bad idea most of the time!



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10.6: Trim Music Files in QuickTime X
Authored by: BMarsh on Apr 19, '10 06:38:10PM

Garageband is the best way to make ringtones for the iPhone, has built-in tools, and passes the finished file to iTunes specifically for that function.



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10.6: Trim Music Files in QuickTime X
Authored by: fursonice on Apr 20, '10 12:36:57AM

instead of changing the extension, trim with QT, export as .mov, drop into iTunes, Create mp3 Version, trash .mov.

i do this all the time -- i too like to listen and slide.



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10.6: Trim Music Files in QuickTime X
Authored by: zo219 on Apr 21, '10 07:18:33PM

Or you could download and use QuickTime Player 7.6.6, which will do lots of things its successor will not.
Runs fine on 10.6.3.



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10.6: Trim Music Files in QuickTime X
Authored by: zongamin on Apr 24, '10 01:30:36AM

This is the exact same hint I submitted in October 2009

http://www.macosxhints.com/article.php?story=20090927094420786



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