MACKIE SDR96 - Manual (Page 9)

9
Operation Guide
Oper
a
tion
Guide
• MIDI IN/OUT — These standard MIDI connectors (female 5-pin DIN) can
be used to send or receive MIDI Time Code (MTC) and MIDI Machine
Control (MMC) when connecting to equipment with transport controls and
a position display.
• ADAT SYNC OUT — This 9-pin D-subminature connector connects to the
SYNC IN connector on an ADAT multitrack recorder when the SDR24/96
is providing the master sample clock. Use male-to-male 9-pin D-sub (DB9)
cable.
• ADAT SYNC IN — This 9-pin D-subminature connector connects to the
SYNC OUT connector on an ADAT multitrack recorder when the
SDR24/96 is the slave. Use male-to-male 9-pin D-sub (DB9) cable.
Whenever digital audio connections are made between devices, the sample clock
of every device must run at exactly the same rate. This is usually accomplished by
selecting one device as the “master” clock source and distributing its word clock
signal to all the “slave” devices in the system. The master is configured to run
from its internal clock, and the slaves from external word clock. Some digital
interfaces are self-clocking (such as the AES input on many DAT machines) and
do not require a separate word clock connection. Others simply cannot be
configured as slaves. The master/slave designation must be correctly made for
each device to avoid the clicks and pops associated with asynchronous clocks.
Generally it doesn’t matter which device in a system serves as the word clock
master. For example, if your SDR24/96 Inputs and Outputs are connected to the
Tape Inputs and Outputs of a Mackie Digital 8
• Bus console using ADAT optical,
either the SDR24/96 or D8B can be the word clock master. (Note: The D8B must
have the Apogee Word Clock Card installed for this application.)