Specifications

Pro Tools Reference Guide622
SCSI HBA (Small Computer System Interface and
Host Bus Adapter) Digidesign’s conformed ter-
minology for SCSI cards. SCSI is a type of data
bus allowing for the high speed transfer of data
between a computer and peripheral devices. An
HBA is the card that connects the SCSI bus be-
tween the computer and peripheral devices such
as hard drives.
send An adjustable additional track output,
which can be routed to an internal bus for ef-
fects processing, monitoring, and submixing.
session file A work file, much like a word pro-
cessing document or a graphics program file. A
Pro Tools session file contains data describing
how media files are to be played and displayed.
It also contains metadata about the files on
which it depends (audio and MIDI files, and re-
lated data such as fades, playlists, and selec-
tions). Each separate project worked on should
be stored as its own session.
session template A Pro Tools session file whose
parameters are preset to a user’s specific pre-
ferred state. Any Pro Tools session may be saved
as a template using the Save As command for
convenience of setup.
slave Device that “follows” the master during
synchronization.
Slave Clock (or Super Clock) Digidesign’s pro-
prietary hi-speed Word Clock that runs at 256x
(256 times) the sample rate. It is required by
Pro Tools|24 MIX and Pro Tools|24 systems to
synchronize audio interfaces to a single, highly-
accurate clock from SYNC I/O, USD, or HD au-
dio interface. See also Legacy I/Os.
Sound Designer II (SDII) Digidesign’s high-qual-
ity digital audio file format.
S/PDIF Semi-professional version of the
AES/EBU standard. Stands for “Sony/Philips
Digital Interface Format.” S/PDIF connections
use coaxial (RCA) or TOSlink optical in/out con-
nectors. Most S/PDIF connections carry two
channels of digital audio at a time.
Spot Audio post production process of aligning
audio events to visual events. In Pro Tools, Spot
mode lets spot regions to particular time code
events.
Standard MIDI File Universal format that can be
read by virtually any software that reads MIDI.
Type 0 is a single line sequence, type 1 is multi-
track.
submix Routing multiple audio sources to an
Auxiliary Input for monitor mixes, bus-master
control over levels, and shared effects process-
ing.
subgroup See groups.
Super Clock (256x) See Slave Clock.
SYNC I/O Digidesign’s multi-format synchroni-
zation peripheral for Pro Tools TDM systems
that supports all major industry-standard clock
sources and time code formats. SYNC I/O fea-
tures near sample-accurate lock to time code or
bi-phase/tach signals and a 192 kHz capable,
high-fidelity, low-jitter Word Clock.
synchronization Process of having two or more
audio, video, or other devices play and record as
one, at the same speed.
Sysex (System Exclusive) MIDI data specific to a
particular piece of hardware or instrument.
TDM (Time Division Multiplexing) A technology
that employs a networked bus of DSP chips that
supply the processing power for Pro Tools TDM
systems.