System Configuration : Preferences : Processing Preferences : Elastic Audio Section

Elastic Audio Section
These preferences determine Elastic Audio usage and settings on new tracks, as well as for previewing and importing tick-based audio.
Default Plug-In
Lets you select any Real-Time Elastic Audio plug-in as the default for previewing and importing Elastic Audio. The selected default Elastic Audio plug-in is also used when new tracks are created with the Enable Elastic Audio on New Tracks option enabled.
Default Input Gain
Lets you attenuate the signal input to Elastic Audio plug-ins by 0 to –6 dB for preview and import. If you experience clipping due to Elastic Audio processing during preview or after import, you may want to set the Default Input Gain to slightly attenuate the audio signal input for Elastic Audio processing. This preference also applies to any audio imported to an Elastic Audio-enabled track.
The Elastic Properties window inherits the Default Input Gain setting. To apply further clip-based input gain attenuation for Elastic Audio processing, select the clip and adjust the Input Gain setting in the Elastic Properties window (see Elastic Properties Window).
Enable Elastic Audio on New Tracks
When selected, new tracks are created with Elastic Audio enabled. The selected default Elastic Audio plug-in is used.
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If the Enable Elastic Audio on New Tracks option is selected, you may want to also select the New Tracks Default to Tick Timebase option in the Editing Preferences page.