Mytek Digital FW DIO Card (ver. 1.2 / Nov 2010) - Manual (Page 11)

Mytek FW DIO Card – User Manual
Connecting Clock Signal Line
Single converter
If a single converter is used in the system, using it's internal
clock will provide the best performance (regardless of what a
clock dealer will tell you.) If external clock is used for systemic
reasons SAMPLE RATE must be set to EXT. by pressing and
holding EXT CLOCK SOURCE switch.
Master 8x192 ADDA converter front panel
Check if the selected sampling frequency of the converter (FS)
matches the sampling frequency in FW Control Panel.
Multiple converters/digital devices
The 8X192 ADDA converter has 6 clock outputs. Clock signal
originates from the very precise CX797 module. Because of that,
the 8X192 ADDA converter is the best clock signal source in the
majority of multiple device configurations. There is no reason to
attempt clocking 8X192 ADDA externally from a dedicated
clock generator. That clock, no matter how good
, will always be
more jittery due to long cable run and thus cannot compete
with built in internal clock.
Our recommended setup when using the 8x192 ADDA with
additional 8x192's utilizing the FW DIO is to have the master
unit on Internal clock and the slave units (connected with
Firewire cable) set to Ext. Clock Source DIOCARD1 or
DIOCARD2 depending on location of the FW DIO card. All
other digital devices can receive wordclock from the 8x192's
multiple clock outputs.
In a system with
multiple units, double
check that the
configuration of clock
signal lines,
synchronization
sources and sampling
frequencies of all
converters in the
system are correct.
Correct clock
configuration is
necessary for the
proper operation of the
converters and for the
best sound quality.
Make the 1
st Mytek in
the chain the clock
master for the whole
studio. There is no
benefit of using a
dedicated clock.
Clocking off the
Mytek's internal clock
generator produces
superior results
because the clock and
the clock line current
drivers are the best in
the industry.
Changing external
synchronization
source while the
program is running
may result in improper
operation of converters
and loud cracks in the
analog section.
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