En la web oficial está os dejo lo que pone en la página..
8.2.1 Release Notes
Improvements and feature changes
* Improvements to Amp presets including better folder organization, additional guitar and bass amp presets and various other changes.
* Improvements to sound quality in Drum Machines.
* Performance optimizations on many Rack presets.
* Many delay devices now use the "Fade" Delay Transition mode, to avoid clicks.
* All Latin Percussion sounds are additionally available as chromatically tuned Simpler presets.
Bugfixes
* Amp is now available in the trial version of Ableton Suite.
* Removed duplicate Amp presets.
* Fixed Hot-Swap behavior for a number of Session Drums and Drum Machines presets.
* Fixed a bug that prevented the use of soundcards with only one input on OS X.
* Fixed a crash that occurred when using a ReWire slave such as Reason and manipulating devices in the slave that were referred to by clips in Live.
8.2.1 Release Notes
Improvements and feature changes
* Improvements to Amp presets including better folder organization, additional guitar and bass amp presets and various other changes.
* Improvements to sound quality in Drum Machines.
* Performance optimizations on many Rack presets.
* Many delay devices now use the "Fade" Delay Transition mode, to avoid clicks.
* All Latin Percussion sounds are additionally available as chromatically tuned Simpler presets.
Bugfixes
* Amp is now available in the trial version of Ableton Suite.
* Removed duplicate Amp presets.
* Fixed Hot-Swap behavior for a number of Session Drums and Drum Machines presets.
* Fixed a bug that prevented the use of soundcards with only one input on OS X.
* Fixed a crash that occurred when using a ReWire slave such as Reason and manipulating devices in the slave that were referred to by clips in Live.
pero ya rollo desfasao que salió el 15... pufff jajaja sorry 
