Audio Random Access (ARA)

Jointly developed by Celemony and PreSonus in 2011, ARA relates to a data-exchange extension for DAW plug‑ins like AU, VST and RTAS, to pass information relating to an entire track, rather than just about a specific moment in time — such as pitch, tempo, rhythm etc. ARA v2 was announced in 2018 with an extended feature set including integrated undo synchronisation. Most of the popular DAWs are now compatible with ARA v2, but the only plug-ins that use it at the time of writing are Melodyne and Revoice Pro.