In addition to what Brock mentioned above, you can use the momentary Freeze performance parameter, and adjust the freeze release time to your liking for a sustain/release sound. This works great with big swells and pads.

If you think you are experiencing some issues with the synth engine distorting/clipping, it would be useful for us if you can provide and audio example and steps to reproduce this. Please email support@eventide.com with this information if you’d like to pursue this further.