virtual boost::shared_ptr<AutomationControl> filter_slope_controllable (bool hp) const = 0;
virtual boost::shared_ptr<AutomationControl> filter_enable_controllable (bool hp) const = 0;
+ virtual boost::shared_ptr<AutomationControl> tape_drive_controllable () const { return boost::shared_ptr<AutomationControl>(); }
+
/* "well-known" controls for a compressor in this route. Any or all may
* be null.
*/