Steinberg Nuendo DD8 Benutzerhandbuch Seite 15

If a valid input signal is applied, SyncCheck is automatically active.
When more than one input signal is present, the input with the lowest
number serves as reference. If the AES input is not chosen as clock
source, SyncCheck takes the chosen clock as reference and compares it
with the input clocks. Inputs which are not synchronous are shown by
quick flashing of the corresponding LOCK LED.
AES/EBU, S/PDIF and TDIF can contain an Emphasis information. Audio
signals with Emphasis have a strong high-frequency boost and thus re-
quire a high-frequency attenuation on playback. If one of the inputs
detects Emphasis, this information is being set at the TDIF output (and
being transmitted correctly to a DTRS machine). The alerting red colour
of the Emphasis LEDs has another reason:
❐
Emphasis is not available within the ADAT standard! This information is
thus neither passed on to the ADAT output, nor taken into account later
on for acoustic transmission!
Each channel's audio level is shown by a level LED. The green LED be-
comes active from -90 dBFS and above, a higher level yields brighter
light. Thus only one LED is necessary to see if there is an audio signal or
digital zero, only noise floor or a useful signal.
6.4 Sample Rate Conversion
Each AES/EBU input has its own sample rate converter (SRC). An SRC al-
lows for a conversion of the sampling rate in real-time. The 24 bit SRCs
used in the Nuendo DD 8 work virtually without loss, i. e. there are no
audible artefacts or noise signals. The SRC works so well that we could
recommend to leave it switched on all the time, and thus eliminate any
clock problem in the first place.
The Nuendo DD 8's SRC yields a maximum conversion ratio of 3:1 or 1:3.
96 kHz can be converted to any sample rate down to 32 kHz, 32 kHz to
any rate up to 96 kHz.
If the internal clock is being used, the SRC works as a perfect jitter killer.
But the Nuendo DD 8 allows for any source as clock reference. With
other settings than INT, the device is slave as usual and the jitter of the
output signal thus depending on the jitter of the clock source.
NUENDO DD 8
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