Mastered for iTunes: how audio engineers tweak music for the iPod age

Music throughout the last decade is typically recorded using 24-bit samples at 96kHz, and advances in computing power and hard disk space have recently made even higher quality, 24-bit 192kHz digital recording possible.

However, even the standard CD format comes in a much lower resolution???just 16-bit 44.1kHz. Compared to 24-bit 192kHz digital audio, a finished CD only has roughly 15 percent of the information captured during the recording process. Compressing the songs on a CD further into 256kbps AAC “iTunes Plus” format cuts the data down to just one-fifth of the size of CD audio, or as little as three percent of the original 192kHz recordings.

Interesting read for the audiophiles out there.



About Matthew Peterworth

I currently work as a Technology Specialist at Henderson Engineers in Kansas City – a Mechanical-Electrical-Plumbing (MEP) design firm. Prior to that I was a Project Manager for Information Technology Services (ITS), the central IT department at the University of Texas at Austin. As of July 2008 I am a Registered Communications Distribution Designer (RCDD) through BICSI. And as of June 2011 I am a licensed Professional Engineer (PE) in the great state of Texas. Please follow me on Twitter @mpeterworth.

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