Apogee UV22HR Guide d'installation

UV22HR in the Internet Audio Environment

An Overview

•Digital systems are not perfect: high quality signals are degraded by

transferring them to lower-quality media such as Internet audio, or even

CD.

•When you convert a signal in this way, you are throwing away detail,

which reduces the quality.

•You can’t simply throw bits away: you need to retain the detail. How?

•In the analog world, a signal could be faded down to nothing and would

smoothly disappear through the noise floor. You could hear detail

through the noise.

•Digital audio isn’t like that: run out of bits and the sound stops.

•You need a method of smoothing out digital audio at low level. How?

•The answer is dither – a noise signal added to the digital audio to

smooth out transitions.

•Unfortunately, most dither causes as many problems as it solves:

oAdds noise

oDetail is lost in the noise

oNoise sounds objectionable

•Many solutions were tried: the best is Apogee’s solution, UV22

•UV22: Sub-Nyquist dither, keeps the dither signal above the audible

range.

•Developed in 1993 – now the mastering industry standard. 80% of

albums mastered with UV22.

•New improved version released in 1999: UV22HR “High Resolution”.

•UV22HR offers increased benefits for mastering, plus outstanding

benefits for Internet, multimedia and computer audio

•Smaller file sizes without loss of quality

•Fewer artifacts, better audio quality

•Easy to incorporate into the OS to process all audio leaving the system

•Apogee’s UV22HR: The solution to better digital audio for new media.

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