'One Bit' Audio Recording
This paper presents the 'Direct Stream Digital' system which has applications in archiving, improved CD quality and Audio for New Media. DSD involves the direct recording of the one-bit output of a delta/sigma-type analogue-to-digital converter. A dynamic range of more than 120dB to 20kHz is provided, with a frequency response from DC to over 100kHz. A simple, very general, discussion of the information requirements of audio transmission is followed by a discussion of the role of DSD in the audio chain including archiving, production and distribution.
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