Interim build 2872 includes over 2,000 changes since the initial 3.0 release. A selection of notable changes since the last interim 2257 is listed below:

New features:
Enable remote-control surfaces:
Generic Midi Control: MIDI Learn ( assign MIDI controllers directly to on-screen knobs )
Generic Midi Control: MIDI Profiles ( pre-configured settings for popular MIDI controllers )
Mackie protocols ( for motorized fader-controllers using the Mackie Control protocol )
Presonus Faderport ( dedicated support for this popular device )
OSC ( remote control over ethernet, see TouchOSC - http://hexler.net/software/touchosc )
"Duplicate" track - creates a copy of an existing track:
The copy includes all channelstrip settings, plugins, I/O connections, etc
Optionally copy the playlist of the source track, or even share the same playlist as the source.
New filters on the plugin manager help you see only the types of plugins you want to see.

General improvements:
When a new plugin is added, immediately show the plugin's GUI ( you can disable this in Preferences->Plugins )
Allow renaming of the top-level session folder:
In the past, the top-level session folder name had special significance; it defined the name of the primary snapshot and the enclosed “interchange” folder with audio and MIDI files. This is no longer the case.
Double-clicking a recent session will now open the last-used snapshot
This solves a problem where renaming the toplevel folder would report that audio and midi files are missing.
Allow hiding/showing the mixer-list.
Improved responsiveness of some Harrison plugin GUIs.
Allow user to overwrite existing template sessions. ( prompt before overwriting )
Various speedups and improvements to waveform drawing.
Dramatically speed-up session shutdown when the session has lots of regions.
Provide user-control over preroll amount. ( see Preferences->Transport )
Double-clicking the channelstrip compressor threshold should now default to 0, not +1dB.
Updated French, Russian & German translations.
Save & recall "insert" latency setting.
Mixbus assign buttons are slightly brighter. ( more improvements coming here in the future )
Improved the layout of some Preferences panels, including MIDI, Control Surfaces, and Plugins panels.
Fixed seamless looping of audio and MIDI.
...plus hundreds of small bug-fixes and user-suggested improvements

System Requirement:
CPU Architecture: Intel, 64bit or 32 bit, 2+ cores/processors required.
OS Version: 10.6.8 or newer, including 10.10 (Yosemite).
Audio: Any CoreAudio-supported hardware.

home page
harrisonconsoles.com/site/mixbus.html

DOWNLOAD: