MOTU 828mkII User Manual page 11

On-board SMPTE synchronization
The 828mkII can resolve directly to SMPTE time
code via the quarter-inch SMPTE input, without a
separate synchronizer. A SMPTE out jack is also
provided for time code generation. The 828mkII
provides a DSP-driven phase-lock engine with
sophisticated filtering that provides fast lockup
times and sub-frame accuracy.
The included MOTU SMPTE Console™ software
provides a complete set of tools to generate SMPTE
for striping, regenerating or slaving other devices
to the computer. Like CueMix DSP, the synchroni-
zation features are cross-platform and compatible
with all audio sequencer software that supports the
ASIO2 sample-accurate sync protocol.
ADAT sync: sample-accurate synchronization
The 828mkII's standard 9-pin ADAT SYNC IN
connector provides sample-accurate synchroni-
zation with all Alesis ADAT tape decks connected
to the system—or any device that supports the
ADAT sync format. For example, if you digitally
transfer a single track of material from an ADAT
via light pipe into audio workstation software on
the computer, and then transfer the track back to
the ADAT, it will be recorded exactly at its original
location, down to the sample.
Word clock
The 828mkII provides standard word clock that
can slave to any supported sample rate. In addition,
word clock can resolve to and generate "high" and
"low" sample rates. For example, if the 828mkII
global sample rate is set to 96 kHz, the word clock
input can resolve to a "low" rate of 48 kHz.
Similarly, when the 828mkII is operating at 96 kHz,
the MOTU FireWire Audio Console lets you
choose a word clock output rate of 48 kHz
("System clock ÷ 2").
A B O U T T H E 8 2 8 M K I I
Punch in/out
The quarter-inch Punch in/out jack accepts a
standard foot switch. When you push the foot
switch, the 828mkII triggers a programmable
keystroke on the computer keyboard. For example,
with MOTU's Digital Performer audio sequencer
software, the foot switch triggers the 3 key on the
numeric keypad, which toggles recording in
Digital Performer. Therefore, pressing the foot
switch is the same as pressing the 3 key. The
828mkII Control Panel software lets you program
any keystroke you wish.
1394 FireWire
The two 1394 FireWire jacks accept a standard
IEEE 1394 FireWire cable to connect the 828mkII
to a FireWire-equipped Macintosh or Windows
computer. The second jack can be used to daisy
chain multiple interfaces — up to four MOTU
FireWire interfaces — on a single FireWire bus. It
can also be used to connect other FireWire devices
without the need for a FireWire hub.
THE 828MKII FRONT PANEL
Mic inputs with 48V phantom power
Two front-panel Neutrik™ combo (XLR/TRS)
jacks with preamps and phantom power let you to
connect a microphone, guitar or any quarter-inch
input with front-panel convenience. The XLR jack
serves as a low-impedance mic input, and the TRS
jack serves as a high-impedance guitar/instrument
input. Dedicated front-panel trim knobs allow you
to adjust each input independently. Defeatable 48V
phantom power is supplied by a front panel switch.
As explained in "Mic sends" on page 10, the pre
amplified signal can be routed to external outboard
gear before being routed back into the 828mkII.
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