MOTU Digital Timepiece Instruction Manual download pdf (Page 121)

SYNCHRONIZATION WITH THE AV

119

Basically, QuikLock mode is a way of achieving

faster lock-up time in situations where you do not

need the MIDI Timepiece AV’s digital audio

synchronization features. If you aren’t syncing

ADATs, Pro Tools or any other word clock device,

you can use QuikLock. If you are syncing ADATs or

any other digital audio device connected to the

MIDI Timepiece AV’s Word Sync Out port, then

you need to use one of the other six synchroni-

zation modes.

As its name implies, LTC QuikLock mode is meant

for synchronizing to time code (LTC) received on

its SMPTE input. A typical example is when you

are slaving the MIDI Timepiece AV to a multi-track

tape deck (with SMPTE time code striped on one

of its tracks) as shown in Figure 2-5 on page 12.

Internal

Choose this setting when you want the MIDI

Timepiece AV to be the time base master and

SMPTE address master. This mode is highly

recommended for stable sync. This mode is also

recommended when you want to use MIDI

Machine Control from your computer sequencer

or from an Alesis LRC connected to the front panel

of the MIDI Timepiece AV.

MTC

Choose this setting when you want the MIDI

Timepiece AV to slave to MIDI Time Code being

sent from a device connected to one of its inputs.

This mode offers the least amount of time base

stability, so we recommend that you try to set

things up so that you can use one of the other

modes.

When the MIDI Timepiece AV MASTER SYNC

mode is set to MTC, it locks to any MTC coming

from your computer. In doing so, however, it also

“swallows” the MTC coming from the computer. If

you attempt to transmit MTC from MIDI software

to a speciﬁc MIDI device in your studio, it won’t

reach the MIDI device because it will get read and

“swallowed” by the MIDI Timepiece AV. What you

need to do, in this case, is have the MIDI Timepiece

AV send MTC to the desired MIDI device. Just use

the SMPTE DESTINATION window (located in

the SMPTE/sync menu) to choose which output

cable(s) you want to send MTC to. Or use the

MTP AV Console software to route MTC as

needed.

LTC

Choose this setting when you want the MIDI

Timepiece AV to slave to incoming SMPTE time

code via the rear-panel LTC input. An example is

an analog multi-track tape recorder with SMPTE

time code striped on a track. The MIDI

Timepiece AV will automatically detect the frame

rate, with the exception that it cannot distinguish

between 29.97 and 30. Therefore, to ensure that the

audio components in your system will be driven at

the proper sample rate, be sure to set the MIDI

Timepiece AV to the proper frame rate when using

either 29.97 (drop or non-drop) or 30.

Intern/Video

Choose this setting when you want the MIDI

Timepiece AV to genlock to house sync video input

(as a time base reference only), but wish the MIDI

Timepiece AV itself to be the SMPTE time code

(LTC and MTC) master address source. This mode

is highly recommended for stable sync. Also use

this mode when you would like to stripe

frame-locked LTC onto video. When using this

mode, be sure to set the MIDI Timepiece AV’s

frame rate to 29.97 (either drop or non-drop, as

necessary or desired), instead of 30. Doing so

ensures that the sample rate being generated by the

MIDI Timepiece AV is exactly as it is set in the

front-panel LCD.

MTC/Video

Choose this setting when you want the MIDI

Timepiece AV to genlock to house sync video input

(as a time base reference only) but make it use

MTC input for the master address source. Be sure

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MOTU Digital Timepiece Instruction Manual Page 121

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