Clock 02 - System Clock Rate; Clock 03 - Audio Pull/Varispeed 0.1 - Steinberg Nuendo SyncStation Operation Manual

>SPDIF
Uses the SPDIF input as the clock reference.
Setting the clock reference in Nuendo
In the Project Synchronization Setup dialog, you can
choose one of the six Clock Reference options from the
Steinberg SyncStation section.
Choosing a clock reference for the SyncStation.

Clock 02 - System Clock Rate

Clock 02-System Clock Rate
>48kHz >44.1kHz >32kHz
The SyncStation runs internally at one of three clock rates
or sample rates. Other sample rates are derived from
these base rates through the use of multipliers.
>48kHz
This is the standard video and film sampling rate. Most au-
dio post studios will use this as the standard operating
clock rate.
>44.1kHz
This is the audio CD standard sampling rate and is used
mostly for music recording. There are exceptions and cer-
tain video productions might use this rate for certain appli-
cations.
>32kHz
You never know when you might need this sample rate.
Even though it is not a professional standard in common
use today, it is included to provide comprehensive support
for legacy devices.
The SyncStation uses a multiplier system to achieve
high-resolution clock rates, see
for details.
Clock rate in Nuendo
When the SyncStation is connected to Nuendo and the
clock is not derived by any other signal (Frame Reference
set to Internal and Clock Reference to Use Frame Ref),
the clock rate will be determined by the Project Setup set-
tings. If the sample rate is above 48kHz, the SyncStation
will choose the rate that is an even multiple of the project's
rate. For example, if the project is running at 96kHz, the
SyncStation will be set to 48kHz.
If you are using higher sample rates, you will have to
!
properly set the word clock and AES/SPDIF output
multipliers to ensure your devices are getting correct
clock rates.

Clock 03 - Audio Pull/Varispeed 0.1%

Clock 03-Audio Pull/Varispeed 0.1%
>Off >-0.1% >+0.1%
When dealing with audio transfers from a film shoot, it can
be necessary to pull the audio clock down by 0.1% in or-
der to match the speed change resulting from a film trans-
fer to NTSC video. Or you might be correcting for a poorly
performed transfer and have to pull-up the clock rate.
There are two audio pull settings in SyncStation, one
for 0.1% and another for 4%. The combination of the two
pull settings yields all the possible pull-up and pull-down
settings.
>Off
The audio clock runs at the chosen rate.
>-0.1%
The audio clock is slowed by 0.1%. For example, using
48kHz as the clock rate with a -0.1% pull-down results in
a sample rate of 47.952kHz.
>+0.1%
The audio clock is sped up by 0.1%. 48kHz pulled-up
yields 48.048kHz.
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Menu Reference
"Word clock" on page 10