The original convolution reverb

Altiverb is a plug-in that makes your audio sound as if it was played back somewhere else, adding the acoustics of existing spaces to your own recordings or to your live audio. All spaces in Altiverb were recorded in the real world, from Sydney Opera House to a Scottish underground oil tank the size of a cathedral.

From all over the world

Longer than anyone in the industry, and with more ear for detail, Audio Ease has been traveling the world to record the acoustics of the best sounding spaces.
The results of hundreds of these recordings are included with Altiverb 8.
Ranging from London's Wembley stadium to the ancient caves of the island of Malta and the churches, concert halls and rock studios from cities like Tokyo, Paris, Amsterdam, Berlin and New York.

The IR browser

The Impulse Response library is now more accessible then ever because of Altiverb's newly designed browser. Select impulse responses by clicking photos of rooms. Instant, gapless loading, finding similar sounding spaces, organize by reverb length (RT60), and single click favorites are just a few of the possibilities. The Impulse Response Browser and the pictures in it are resizable and contains an extensive search field.

Altiverb XL supports more than two inputs. With more than two inputs there is no longer a direct relation between an input and a speaker that was used when making the impulse response. Therefore the Positioner tab is unavailable. Instead there is a new control: cloud size. With cloud size turned down, the reverb no longer outputs to all output channels, it starts clustering around the input pan position of your sounds. Even when the input sound moves, the reverb cloud travels along with it. The Altiverb 8 guided tour video gives an example of input pan following reverb starting at 5:43.