dCS Delius User Manual Manual for Software Issue 2.3x
dCS Ltd September 2004
Manual filename: Delius Manual v2.3x.doc Page 73 email: more@dcsltd.co.uk
English version web-site: www.dcsltd.co.uk
Definitions and Abbreviations
ADC Analogue to Digital Converter, sometimes referred
to as an A/D Converter.
AES3 A standard professional stereo digital audio format
consisting of one serial PCM data line. It uses a
balanced cable to extend transmission distance
and includes a comprehensive messaging system.
DAC Digital to Analogue Converter, sometimes referred
to as a D/A Converter.
dB A relative signal level or ratio in decibels. The
context may indicate the reference level.
dB0 Level in decibels, referred to a full scale sine wave
in a sampled system. So, 0dB0 is full scale.
dBu A signal level relative to 0.775V rms, making no
allowance for external loading.
DDC Digital to Digital Converter, sometimes referred to
as a D/D Converter.
DSD Direct Stream Digital - a single bit digital audio
format, sampled at 2.822MS/s.
kS/s Sample rate in kilo-samples per second. This
replaces kHz, which is technically incorrect when
referring to sample rates.
SDIF-2 Sony Digital InterFace – a stereo digital audio
format consisting of 2 serial PCM or DSD data
lines. Usually used with a Word Clock.
SPDIF Sony / Philips Digital InterFace – a stereo digital
audio format for consumer equipment, consisting
of one serial PCM data line. Similar to AES3, but
unbalanced and with different messaging.
Word Clock A synchronisation signal consisting of a square-
wave, the frequency of which is the sample rate.
Usually transmitted through co-axial cable and
BNC connectors.
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