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AES3 AES3-1992: “AES Recommended Practice for Digital Audio Engineering
– Serial transmission for two-channel linearly represented digital audio data”
Published by Audio Engineering Society, Inc.
AES3 is a specification of the AES/EBU digital audio format. AES3 specifies
the frame format for the audio data in both professional and consumer mode, as
well as the electrical interface for the professional balanced XLR connection.
AES3 is however primarily a professional standard. The detailed specification
for the consumer interface is IEC 60958.
IEC958 IEC 60958 1989: “Digital Audio Interface”. Published by the International
Electrotechnical Commission.
IEC958 is a specification of the consumer AES/EBU digital audio format also
referred to as S/PDIF. IEC958 specifies the frame format for the audio data in
consumer mode, as well as the electrical interface for the unbalanced data
connection.
AES11 AE11-1991: “AES Recommended Practice for Digital Audio Engineering –
Synchronization of Digital Audio Equipment in Studio Operations”. Published
by Audio Engineering Society, Inc.
AES11 is a recommendation for synchronization of digital audio signals.
Recommendations are made concerning the accuracy of sample clocks as
embodied in the digital interface signal, and concerning the use of this as a
convenient reference signal.
EN50082 EN 50082-1: “Electromagnetic compatibility – generic immunity standard,
part 2: Residential, commercial and light industry”. Published by CENELEC
1992. Note that the standard also covers EN 50081-1 (part 1).
EN 50082-1 is the standard specifying the requirements for CE compliance
concerning Immunity following the EEC provisions of directives 92/31/EEC.
EN500022 EN 500022-1: “Limits and methods of measurement of radio interference
characteristics of immunity” Published by CENELEC 1987.
EN 500022-1 is the standard specifying the requirements for CE compliance
concerning Emission following the EEC provisions of directives 89/336/EEC.
IEC 268-10 IEC 60268-10: edition 2.0 “Sound system equipment – part 10. Peak programme
level meters” Published by the International Electrotechnical Commission
1991-03.
EN 60268-10 is the standard specifying the requirements of audio-frequency
peak programme level meters, for use in equipment for broadcasting, sound
reinforcement, sound recording, and household entertainment.
DITHER The dither of the ADDA 2402 is implemented by using a psychoacoustic noise
shaping filter for truncating the 24 bit audio word to 16, 18 or 20 bits, while the
24 bit sound quality is preserved. A detailed description of the dither algorithm
can be found in the AES paper: “Psychoacoustically Optimal Noise Shaping” by
Robert A. Wannamaker, Journal of the Audio Engineering Society, Vol 40,
No 7/8, 1992 July/August.
7. References
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