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I have iTunes match with a decent library (12k+ songs) on my Macbook Air.

I'm running out of free space on my SSD and noticed that the size of my library has doubled since I signed up for iTunes Match.

It looks like a lot of my songs have been upgraded to 256kbps bitrate.

Is there a way to go down to 128 or 192kbps in order to save some space?

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up vote 2 down vote accepted

I have seen the same thing happen to my hard drive since enrolling in iTunes Match. Fortunately there are a couple of options.

One option is to select any songs you'd like to down-convert, right-click (or ctrl-click) the selection, and choose "Create xxx Version". This will re-encode the tracks based on the encoding options you have set within iTunes Preferences. Feel free to adjust these settings to the quality of your choice. Once they have finished converting, you may remove the higher-quality local copies. iTunes in the Cloud will retain the higher-rate 256kbps version, but your computer will now have a lower-quality version to playback from.

You can also remove local copies of songs entirely, by selecting them and pressing "delete". The songs will remain in your iTunes library as stream-able tracks through iTunes Match. Before doing this, though, I highly recommend backing up your entire library of songs to an external hard drive for safekeeping.

Hopefully between a combination of these two options you can reclaim much of your lost space.

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iTunes Match music is available in the iTunes+ format, which does not include DRM, and you can use the following menu to re-encode selected songs: In iTunes, select the song you want to re-encode, then go to File -> Create New Version

At this time there is not a way to force a specific version of a song to be uploaded to iTunes Match.

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iTunes Match does not contain any DRM songs. If you had previously purchased a song with DRM through iTunes, it automatically matches to the DRM-free version: – bispymusic Mar 19 '13 at 15:28
As can be seen here, the DRM catch may still be the case for some songs (though rare)… – zwerdlds Mar 19 '13 at 18:30

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