Specifications

DigiRack Plug-ins Guide120
Pro Tools is very aggressive with its transient de-
tection in order to detect every possible audio
event. Consequently, it is possible to have erro-
neously detected events. These events will be
analyzed with a low degree of confidence and
can be filtered out by lowering the Event Sensi-
tivity in the Elastic Properties window. Filtering
out any false transients can result in higher
quality Elastic Audio processing.
Conversely, for material with few clear tran-
sients, Elastic Audio analysis may not accurately
detect audio events, and those detected may be
detected with a low level of confidence. You can
relocate or add Event markers where necessary
in Analysis view.
For example, a slow synth pad may not have
clear transients and detected Event markers may
be incorrectly located or may have not been de-
tected at all. In Analysis view, you can relocate,
remove, and add Event markers as necessary
(such as where the chord changes). Accurately
locating Event markers yields better results
when applying Elastic Audio processing.
Real-Time and Rendered
Elastic Audio Processing
Real-Time Elastic Audio processing means that
any changes to Elastic Audio processing—
whether it be a tempo change or a manual TCE
warp—take effect immediately. However, Real-
Time Elastic Audio processing can be very de-
manding on your system’s resources. Conse-
quently, you may want to use Rendered Elastic
Audio processing in some cases. With Rendered
Elastic Audio processing, when you make a
change to Elastic Audio processing, any affected
audio regions temporarily go offline, a new
“rendered” audio file is generated and the af-
fected audio regions come back online.
Note that peak amplitude is not the most
important measure for event confidence.
The clarity of transients is measured in part
by the spectral transition from one moment
to the next. This tends to favor higher fre-
quency content in terms of event confidence.
For example, changing the Event Sensitivity
in the Elastic Properties window for a se-
lected drum loop results in the clearer tran-
sients of the higher frequency hi-hat hits
having more event confidence than the less
well defined transients of the lower fre-
quency kick drum hits even though kick
drum hits have a higher peak amplitude.
When processing non-rhythmic audio (such
as legato strings) with the Polyphonic plug-
in, reducing the number of Event markers
often yields better sounding results. You can
either manually remove Event markers in
Analysis view or lower the Event Sensitivity
setting in the Elastic Properties window for
the region you want to process (see “Event
Sensitivity” on page 124).
For information on editing in Analysis
view, see the
Pro Tools Reference Guide.
In Rendered mode, any change you make is
rendered using the original source audio to
avoid generational loss from multiple subse-
quent edits.