Specifications

Chapter 4: Using SYNC Peripherals 43
 When Pitch Memory is enabled, Pro Tools
continues to play and record at the resolved sam-
ple rate even if the Clock Reference source disap-
pears.
 The SYNC peripheral retains the Pitch Mem-
ory setting, even when the unit is powered off
and on again, until you change it.
To configure Pitch Memory using Pro Tools:
1 Choose Setup > Peripherals and click Synchro-
nization
.
2 Select the Pitch Memory Enabled option.
3 Click OK.
To configure Pitch Memory using the front panel
controls:
1 Press Set, and use the Up and Down switches to
display Pitch Hold (“PICH HLd”).
2 Press Set.
3 Press the Up or Down switches to toggle be-
tween On and Off.
4 Press Set.
To configure Pitch Memory using the SYNC Setup
software utility (Windows only):
 Click Pitch Memory Enabled.
Positional Reference
and Options
The following sections provide additional infor-
mation for each available Positional Reference
format.
Linear Timecode (LTC)
LTC is often striped onto an ATR or VTR audio
track. Professional VTRs typically have an ad-
dress or cue track, intended for LTC. If you are
working with a standard audio tape, you’ll al-
most certainly be working with LTC. If you’re
working with a videotape, you may be able to
work with either LTC or VITC, or both.
LTC can also be generated as an interpolation of
Absolute code. This is how timecode DAT ma-
chines, DA-88s, and many digital VTRs work.
LTC is delivered to the SYNC peripheral as a se-
ries of audio pulses, regardless of how it is
stored or generated.
LTC can be used simultaneously as a positional
reference and a clock reference.
To set LTC as the SYNC peripheral positional
reference from Pro Tools:
 In the SYNC Setup section of the Session
Setup window, choose
LTC from the Positional
Reference
pop-up menu.
To set LTC as the SYNC peripheral positional
reference using the front panel controls:
 Press the Positional Reference switch to select
LTC.
The Positional Reference setting you choose
remains set, session to session, until it is
changed again.