More details from High End Systems (www.highend.com):
Show File Compatibility
Show files created with (or saved using) Hog 4 OS v2.2.0 are not backwards compatible with Hog 4 OS v1.2.1 or older or with any version of Hog 3 OS. However, older pre-existing Hog 4 OS and Hog 3 OS show files are forward compatible with Hog 4 OS v2.2.0.
New Features
Playback Masking
A new feature known as “playback masking” has been added to cuelists and scenes. Playback masking allows users to select which fixture function kinds a list or scene will play back. Playback masking does not determine how data is recorded into the list or scene and does not change existing recorded data. Playback masking only determines which parts of the already recorded cue/scene data will be executed when that cuelist or scene is played. See section 17.5.8 of the v2.2.0 Hog 4OS help manual for details.
Playback Rate & Effect Rate/Size Scaling
The playback rate, effect rate, and effect size of masters (cuelists, scene, and chases) can now be adjusted by assigning the button and fader controls of a master to various scaling functions. See sections 17.5.1 and 17.8.1 of the v2.2.0 Hog 4OS help manual for details.
RackHog 4 Support
Hog 4 OS v2.2.0 adds support for the RackHog 4 console.
HedgeHog 4N Support
Hog 4 OS v2.2.0 adds support for the HedgeHog 4N console.
A number of bug fixes have also been announced; for details go to www.highend.com.