Preparation of tracks for mastering
Aeternum Mastering was the fourth studio in Russia recognized by Apple, as an accredited supplier to mark the master tracks of music with high sound quality "Apple Digital Masters" and included in the list of providers "Apple Digital Masters Providers list".
Apple together with the best audio engineers have developed a new algorithm for compression codec AAC, which in turn allowed to preserve sound quality soundtracks with virtually no loss of quality. Encoding format AAC (.m4a) comes with a resolution up to 24bit / 96kHz, which is much higher than the usual CD-quality 16bit / 44.1kHz. Files for "Apple Digital Masters" must meet the minimum requirements, format or .WAV .AIFF, 24bit or 32bit, 44.1 kHz or higher, with a large dynamic range, without processing and compression of compressors and limiters.
For more information "Apple Digital Masters" you can find in this document.
You can order a service "Mastered for iTunes" just €30 EUR, you get prepared tracks for digital releases in the "iTunes Store" in the following formats (.m4a .mp3 .wav) with a resolution of up to 24bit / 96kHz. The final coding occurs only in the middle of "Apple iTunes" after checking the master track and is only accepted from accredited studios.