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88
16
This setting is the factory default and allows to input a Word Clock reference
signal between 32.0kHz and 192.0kHz. Its clock rate will be displayed in the
status menu »CLOCK
IN
«. The Word Clock reference signal will be internally
regenerated and distributed phase-aligned to all eight Word Clock outputs.
Simultaneously, the input signal will be converted into AES11 and S/P-DIF
and output at the corresponding outputs. So, with one Word Clock reference
signal you can synchronize various devices by Word Clock, AES11, S/P-DIF
coaxial and S/P-DIF optical at the same time.
Differences between AES3 and AES11
Both standards, published by the Audio
Engineering Society (AES), are based on the
same interface, commonly called as AES/EBU
interface which uses XLR connectors.
The AES3 standard carries both, the digital
audio data and the reference clock informa-
tion. The AES11, also know as ‚blank frame
signal‘, does not carry any digital audio
data, but only the reference clock informati-
on for synchronization.
Word Clock as Input Reference including Options
A special function can be added when pressing the SELECT key for a second
time. This activates the »HOLD« function which leads to a fail-safe output
of all outgoing signals. Interruptions within the input reference signal or
even its total loss will not affect the continuous availability of all outgoing
signals.
AES3/11 as Input Reference including Options
S/P-DIF op
AES3/11
WCLK
S/P-DIF co
REFERENCE
REF PASS
HOLD
x 256
x 2
x 1
x 4
CLK
MULTIPLIERS
1
6
5
4
3
2
S/P-DIF op
AES3/11
WCLK
S/P-DIF co
REFERENCE
REF PASS
HOLD
x 256
x 2
x 1
x 4
CLK
MULTIPLIERS
1
6
5
4
3
2
S/P-DIF op
AES3/11
WCLK
S/P-DIF co
REFERENCE
REF PASS
HOLD
x 256
x 2
x 1
x 4
CLK
MULTIPLIERS
1
6
5
4
3
2
This setting allows to input an AES3 digital audio signal or an AES11 re-
ference clock signal between 32.0kHz and 192.0kHz. Its clock rate will be
displayed in the status menu »CLOCK
IN
«. The AES3/11 input signal will be
regenerated and converted into Word Clock and S/P-DIF and transfered to
the corresponding outputs simultaneously.
If an AES3 digital audio signal is feed in, it will be standardly output as AES11
reference clock signal. Similarly, the digital audio data will be not transfered
to the S/P-DIF outputs, but only the clock reference data for synchronization
purposes.
S/P-DIF op
AES3/11
WCLK
S/P-DIF co
REFERENCE
REF PASS
HOLD
x 256
x 2
x 1
x 4
CLK
MULTIPLIERS
1
6
5
4
3
2
There are two further function options available when feeding in an AES3 or
AES11 signal: »HOLD« + »REF PASS«.
Locking so-called
»Super Clocks«
Your MC-7 is able to lock to so-
called »Super Clock« (SCLK) reference
signals. These clock signals are used
preferably for older digidesign ProTools™
MX systems. Specified are only two clock
rates, 11.2 12.288MHz which are
the x256 multiples of the Word Clock rates
44.1kHz and 48.0kHz.
When locking to one of these Super Clocks,
the rate will be inverted displayed in the
»REF CLOCK
IN
« menu. Due to this, the LED
in front of the corresponding base clock
rate, that means Word Clock rate, does not
light while all other LEDs light (see exam-
ples below).
!
CLOCK
IN
88.2
48.0
44.1
32.0
192.0
96.0
176.4
Super Clock of
44.1kHz Word
Clock
Super Clock of
48.0kHz Word
Clock
CLOCK
IN
88.2
48.0
44.1
32.0
192.0
96.0
176.4
