â€śMastered for iTunesâ€ť is out. Last month, our buddy blog Trust Me, I’m A Scientist published this piece which explores the tools, the best practices, and the controversy. Click thru to TMIAS for the full article, and read an excerpt here.
Although the application is novel, the basic concept is nothing new. Mastering engineers have long made separate masters to account for the quirks of different mediums like CD, vinyl and even tape cassette. 2012 marks the first time that engineers have had the tools, and the economic incentives, to tailor separate masters to compensate specifically for the idiosyncrasies of iTunesâ€™ data-compressed AAC format.
Appleâ€™s 256 kbps AAC files are supposed to sound pretty close to CD-quality and they routinely fool listeners in double-blind listening tests. But when record-producer/living-legend Rick Rubin heard the iTunes version of his new Red Hot Chili Peppers production Iâ€™m With You, he was reportedly appalled by how its sound changed during the conversion process.
â€śHe was horrified,â€ť Grammy-winning mastering engineer Vlado Meller told me when I visited him at Masterdisk.
â€śIt was as if they had notched out certain frequencies in order to compress the file. When we did the A/B test with the original and the iTunes release it was like it was two different masters. If it wasnâ€™t for [Rubin] making a stink and putting his weight behind it, we wouldnâ€™t have this today. He deserves the credit for that.â€ť
Click thru to Trust Me, I’m A Scientist for the rest of this feature, by Justin Colletti.