DigiDesign Digidesign Pro Tools 8.0, Reference Manual

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Pro Tools Reference Guide 874
Voice Usage and Total Latency for
RTAS Plug-ins
(Pro Tools HD Only)
With Pro Tools HD, the initial insert of an RTAS
plug-in may cause additional latency, and will
take up two additional voices per channel (one
voice for input and one voice for output) in the
following conditions:
• When inserted on an Auxiliary Input or
Master Fader track
• When inserted on an Instrument track that
does not contain an instrument plug-in
• When inserted after a TDM plug-in on any
kind of track
For example, the initial insert of an RTAS plug-
in on a mono Auxiliary Input track uses two
voices (one channel with two voices), while the
initial insert of that plug-in on a
stereo Auxiliary
Input track uses four voices (two channels with
two voices each).
Subsequent RTAS plug-ins on the same track do
not take up additional voices unless a TDM
plug-in is inserted between other RTAS plug-ins.
Audio tracks that have active RTAS plug-in in-
serts cannot be explicitly voiced. The voice allo-
cation must be set to
Dynamic or Off .
Furthermore, one additional voice is used for
each occurrence of any of the following condi-
tions when using voices for RTAS plug-ins on a
track:
• When you use the external key side-chain
of an RTAS plug-in on that track
• When you select multiple track outputs for
that track (one voice used for each output)
• When you select an AFL/PFL Path output in
the Output tab of the I/O Setup dialog (one
voice used for each channel)
Viewing Inserts
Both the Mix and Edit windows can be config-
ured to show or hide inserts A–E and F–J. Plug-in
windows provide complete access to plug-in
controls.
Avoid inserting TDM plug-ins between
RTAS plug-ins on any kind of track—this
causes unnecessary voice usage and may
cause additional latency.
When you use Pro Tools 6.9.x or lower to
open a session originally created with
Pro Tools 7 or later, any RTAS plug-ins in-
serted on Auxiliary Input or Master Fader
tracks—or after TDM plug-ins on any kind
of track—will become inactive.