outline a "NoSampleAccurateControl" LV2 feature:

outline a "NoSampleAccurateControl" LV2 feature:

Since control-ports have a fixed value for the current process-block,
Ardour splits a plugin's run() process cycle on every automation event
to facilitate sample-accurate automation.

Since automation is interpolated between events, this ensures that each
explicit automation point is reached (not interpolated).

Plugins where this is not required and which favor a fixed block-size,
can now specify an optional Feature: NoSampleAccurateControl.

One example: a convolution plugin with smoothed gain control.