Ask the iTunes Guy
Kirk McElhearn answers your iTunes questions
Does iTunes convert?
Q: My iTunes library contains a lot of MP3 files that I ripped with software other than iTunes. When I add these files to iTunes, or sync them to my iPhone, does iTunes convert them to AAC
files? If so, does this mean that the files take up extra space on my hard drive?
A: There are two questions here. The first is about the file formats that iTunes supports, and the second is about syncing.
Since iTunes uses AAC as its default format for ripping CDs and files purchased from the iTunes Store are in that format, many people think that iTunes only handles AAC files. iTunes supports files in the following formats: AAC, MP3, WAV, AIFF and Apple Lossless. (It also supports Audible audiobooks.) iTunes can store and play files in any of those formats. Also, there seems to be a common belief that AAC is a proprietary audio file format created by Apple. This is not the case. AAC stands for Advanced Audio Coding, and is part of the MP4 specification.
iTunes only converts files in two specific situations. The first is when you add WMA files to an iTunes library on a Windows PC. When you do this, iTunes converts them to the format you’ve set in the Import Settings dialog of the General preferences, because it does not support the WMA format. iTunes does not, however, delete the original WMA files, and it’s up to you to do so if you don’t want to keep them.
The second is when you tell iTunes to convert high bit rate files to lower bit rate versions during a sync to an iOS device. You control this on the Summary pane of your iOS device when syncing.
When iTunes performs this conversion, it doesn’t keep two versions of the files, but converts the files on the fly, putting the lower bit rate versions on the
iOS device. This allows you to save space on your iOS device by choosing a lower bit rate for syncing, yet keeping higher bit rate versions of your files in your iTunes library.
Which playlist is a song in?
Q: I have lots of playlists in my iTunes library. Sometimes I want to find which playlist a specific song is in. Is there any way I can do that?
A: If you right-click or Ctrl-click a song you can choose Show in Playlist to see all the playlists that contain the song.
Choose one of the playlists from the sub-menu to go to the selected track in that playlist.