[First posted at RamblingLibrarian.blogspot.com, 10 Jun 06]
NOTE: THE FOLLOWING STEPS WORK ONLY FOR NON-PROTECTED FILES
Here’s something I learnt — how to convert MP4 audio files to MP3 using iTunes version 7.x (OS X):
[The screens are for iTune versions 7.x. on a Mac. For iTunes version 8, the Import settings has been moved to the “General” pane in “Preferences”. You should see a “Import Settings” button, and then a “Import Using” options. Or check out this post.]
Background: I’d created my Saturday In May in GarageBand and it was saved as an MP4 audio file. Apparently some of my friends were unable to play in that format so I searched for a way to make the conversion. Kevin described broadly how it could be done via iTunes.
I’d also found this freeware called Switch (www.nch.com.au/switch), which worked quite well but I realised iTunes, while a bit cumbersome compared to using a software convertor, allowed more control over the conversion (e.g. setting the bit rate and overall sound quality). So here’s a step-by-step process of how a conversion could be done using iTunes (click on the images for larger sizes):
#7 – If you’ve selected ‘Custom’, you’ll see this window; just check that your Stereo Bit Rate and Sample Rate are to your desired settings (sorry, I can’t give through explanation on audio settings. I just know that it’s safest to set the Sample Rate at 44.1 khz or else the audio file you upload might playback with a Sped-up High-pitched Chipmunk effect)
#9 – At the iTunes menu, select Advanced -> Convert Selection to MP3 and the conversion would start (note: If you’ve selected something else in Step #5, you’ll see that respective option. E.g. if you’ve selected ‘AAC Encoder’ under ‘Importing’ at Preferences earlier, you’ll see Convert Selection to AAC instead)