Usually masters for digital use (CD, download, streaming etc) are sent to you as WAV files finished to -0.1dB at 16 bit, 44.1. This is the preferred format of the majority of digital distributors.
iTunes will accept these masters fine, but we also offer “Mastered For iTunes” specifications which are finished a little differently for a higher quality.
Note: If you only want Mastered For iTunes versions then it’s no extra charge – However they will not be compatible with most other resellers, so we suggest you get the regular finish and also the Mastered For iTunes versions too.
Mastered for iTunes versions are charged at £5 extra per song.