Specifications
6BUsing the AES16
AES16 User Manual 63
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6 card.
Selecting Play 2 (P2L and P2R) in the next set of Monitor Source Buttons down, and un-
muting this source, allows you to monitor audio from Play 1 and Play 2 out of Digital
Out 1 at the same time. If one application or playback stream is assigned to Play 1,
another to Play 2, you would hear audio from both out of Digital Out 1. You can adjust
the relative level of these two sources with the volume slider directly underneath each
Monitor Source Button.
Similarly, Record sources can be added so that up to four combinations of live input, and
pre-recorded playback can be routed and mixed to a single output. In this way,
headphone mixes, alternate house feeds, or a seamless blend of canned and live broadca
material can be easily routed to appropriate outputs on the AES1
7.4 Clock selection and control
A valid clock source signal must be connected to
the appropriate AES16 clock connector when the
Sample Clock Source is set to “External,”
“Header,” or one of the Digital Inputs. If a signal
is not present, the sample clock generator will
run very slowly or erratically. Symptoms of this
problem include audio files that sound either
fast, slow or garbled.
The AES16 also includes a SynchroLock
clocking system to provide robust
synchronization to degraded input clock signals.
Refer to Section 5.3 for a detailed description of
SynchroLock.
When a valid clock source is present, the
frequency and type of clock signal must match
the Sample Clock Reference setting selected on
the Adapter window the Mixer. The frequency of
word clock sources, chosen by setting the
Sample Clock Source/Reference to
“External/Word,” “Header/Word,” or “Digital
In/Auto,” must match the sample rate specified
when recording new files, or the sample rate
associated with a previously recorded file during
playback.
For example, if a 44.1 kHz word clock is
connected to the external clock input, the Sample
Clock Source/Reference must be set to
“External/Word” and the sample rate must be set
to 44.1 kHz when a new file is being recorded in
an application. Failure to do so will result in files
being recorded at the wrong sample rate.