REAPER updates are evolutionary, not revolutionary. REAPER 4 is not a radically new experience from REAPER 3, but adds a number of useful new features, ease of use improvements, and even more of that legendary REAPER customizability.Tweak, correct, and mangle audio with pitch envelopes, which can be applied to individual media items.Create fully automated surround mixes with multichannel track metering and the highly flexible ReaSurround plug-in. Apply rotations, transformations, and diffusions, and even automate the positions of the speakers themselves.Batch rendering wildcards provide sound designers with unprecedented flexibility when generating sound files in bulk.Manage project media and FX with the Project Bay, where you can collect, organize, and edit a list of resources that you are using, or might use, for different types of projects.More CustomizableArrange REAPER's windows and toolbars in multiple dockers, redefine your mouse behavior with mouse modifiers, and use the new WALTER layout template engine to create flexible custom layouts for track/transport/mixer GUI elements.