User Manual

Pro Tools Reference Guide870
X-Form Plug-In
(Rendered Only)
The X-Form Elastic Audio plug-in is a modified
version of the standalone X-Form AudioSuite
processing plug-in (based on the Radius
®
algo-
rithm from iZotope). The X-Form Elastic Audio
plug-in is for Rendered Elastic Audio processing
only and cannot process in real-time or as an
AudioSuite plug-in. It provides the highest qual-
ity time compression algorithms for music pro-
duction, sound design, and audio loop applica-
tions. Use it to manipulate audio loops for
tempo matching or to change vocal tracks for
formant correct pitch shifting.
Quality
Select either Maximum or Low (Faster) from the
Quality pop-up menu. Maximum is the slowest
processing algorithm, but provides the highest
quality results. Low (Faster) produces relatively
good results and is much faster than the Maxi-
mum setting.
Formant
For audio material with clear formants, enable
Formant to preserve the formant shape of audio
when applying TCE processing.
Elastic Audio plug-in: X-Form
Audio with a fundamental pitch has an
overtone series, or set of higher harmonics.
The strength of these higher harmonics cre-
ates a formant shape, which is apparent if
viewed using a spectrum analyzer. The over-
tone series, or harmonics, have the same
spacing related to the pitch and have the
same general shape regardless of what the
fundamental pitch is. It is this formant
shape that gives the audio its overall char-
acteristic sound or timbre. When pitch
shifting audio, the formant shape is shifted
with the rest of the material, which can re-
sult in an unnatural sound. Keeping this
shape constant is critical to formant correct
pitch shifting and achieving a natural
sounding result.