djay supports all songs bought in the iTunes Music Store, both DRM-protected and "iTunes Plus". Note that some restrictions apply to DRM-protected songs, as indicated by the

icon used throughout the application.
iTunes Plus (DRM-free) Songs
Fully supported by djay (no restrictions).
DRM-protected Songs
Playback and most of djay's functionality is fully supported even for DRM protected songs: Looping, Cue Points, Saving of effect settings, Reverse, Speed, Pitch, EQ, Gain, Panning, Automix, Pitch Bend, BPM tap and sync, etc.
Yet, there are a few inevitable limitations and restrictions of some features with DRM-protected songs, which are also indicated by the

icon in the application:
-
No Recording
-
No Pre-Cueing
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No Audio-Unit effect plug-ins
-
Scratching and reverse playback at reduced quality
-
Speed "Key" always enabled
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No Echo/Reverb Effect
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Some transitions (Echo, Backspin, Reverse) cannot be applied. The standard transition will be used instead.
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No Backspin/Forwardspin
-
Mid EQ band not changeable