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I
SYNCHRONIZING THE 688 TO ANOTHER TAPE DECK
Machine synchronization is much more complicated than
MIDI synchronization. MIDI is done electronically, while
synchronizing two tape machInes together involves
motors, inertia, and other factors in addition to
electronics.
It also involves SMPTE Time Code. an audio tone
recorded on a track of the recordar the same way that
MTS sync tone is. But instead of MIDI clocks and Song
Pointer, SMPTE time code continuously issues the time in
hours. minutes, seconds, and frames. A synchronizer
reads this time code from two tape machines at once,
then issues commands to the slave machine that cause it
to "chase-lock" with the master machine..
The 688 MIDISTUDIO is equipped with a serial interface
port (ACCESSORY
2)
that allows it to be either master or
slave when connected to the TASCAM MIDiiZER or other
synchronizers thet support the TASCAM serial interface
standard. A complete explanation of procedures will be
found in the manual for your synchronizer but here are a
few notes about recording and playing
back
SMPTE that
you must know.
Recording SMPTE TIme Cod.
1.
Take the TIME CODE GENERATOR OUT of the syn-
chronizer and plug it into the EXT SYNC IN
IIICk
of the
688.
2. Set the SYNC switch on the 688 to EXT. The yellow
LED will
turn
on.
3. Turn the RECORD FUNcnON for Track 8 on.
4. Turn both INSERT and MIX
off in the MONITOR MODE
keys so you can see the time code on tho GRP/TRK B
meter.
5.
Set the EXT SYNC IN LEVEL control until Group
8's
meter reads 0 dB. Alternatively, the time code gen-
erator may have its own output level control.
6. Press RECORD and PLAY. Press START on the time
code generator.
For playback;
7. Connect the EXT SYNC OUT jack to the Time Code
Input (either Master or Slave) of the synchronizer. To
start with. set the EXT SYNC OUT LEVEL to the "3
o'clock" position (a quarter turn below full output).
8. Press PLAY. The time code display on the synchro-
nizer or reader should increment. To verify that the
machine Is getting time code (and not counting tach
pulses), temporarily unplug the ACCESSORY 2 Jack
from the
688.
If the reader still
Is
running, and
it
stops
and starts as you stop and play the 688, vou've suc-
cessfully recorded SMPTE.
-34-
MIDI Mixer Control
In addition to the MIDI Sync capabilities, the 688 also
provides access to functions which are achieved relying
on MIDI program change and Note On/Off commands. You
don't have to use any of them If you don't W1Int to. But
you should be aware of the possibilities. More specifically
you can:
• Use an "UP/DOWN" footswitch to IS8ue Program
Chango commands to your MIDI Instruments from
the
688.
• Send Program Change commands from a MIDI key-
board or other controller to change ecene numbers of
the 688.
• Use note commands from a keyboard or sequencer to
individually mute and unmute the main channels of
the
688.
• Set the MIDI channel of the
688
80
it will send and
receive commands on any MIDI channel.
TRANSMITTING MIDI PROGRAM CHANGE
COMMANDS FROM THE 688
.lf2.a.kJ,m
1. Connect a MIDI cable from one of the MIDI OUTs of the
688 to the MIDI IN of the instrument.
2. (Optional) Connect the RC-SOP footswitch to the RE-
MOTE UP/DOWN jack of the
688.
(Otherwise, you can
use the 10-number keys of the UPIDOWN keys directly
on the 688.1
Setting the MIPI channel
3. Press the SCENE/MIDI CH key until the MIDI CH indi-
cator appears above the scene number. Now the
number displey will show the current MIDI send and
receIve channel: ON (omni on, which makes the 688
receive all MIDI channel and send messages on channel
1),
1-16, or OF (off, which makes the
688
Ignore
all
Program Change and Note On/Off messages).
4. Find out what MIDI channel your Instrument
is
receiv-
ing on (the
de~ault
setting is uauallv channel
11. Check
the owner's manual for your instrument
jf
you don't
know how.
5. Using the UP end DOWN keys,
set
the MIDI channel of
the
688
to the channel of your instrument.
6. Press the SCENE/MIDI CH key. The number displav sill
go back to showing the scene num-ber. and the MIDI CH
indicator will go out.
Check
Ogoratioo
7. Press
the
10-number keys or
the
UP/OOWN.1ceya then
RECALL. Your instrument should change programs st
the same time the
688
changes scenes.
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