Audio Ease Altiverb 6 (XL) Reverb, from Audio Ease

Altiverb 6 XL Specs:

Windows: VST, RTAS and Audio Suite.

Mac OS X: MAS, Audio Unit, RTAS and Audio Suite, Universal Binaries for both Power PC and Mac-Intel Power PC VST

-The Full Altiverb Impulse Response library
-Full parameter automation
-an impulse response browser that replaces the impulse response popup menu.
-mono to mono, mono to stereo, and stereo to stereo channel configurations.
-supported sample rates up to and including 96 kHz.
-40 automation preset memories for total-recall via parameter automation.
-iLok or Challenge-Response authorization.
-Sample your own spaces or gear (Mac only)
-All channel configurations up to 5.1 surround.
-TDM support, on Mac OS X for all HD DSP chips, Accel and non-Accel and expansion chassis. TDM sample rates supported: 44.1 kHz, 48 kHz, 88.2 kHz and 96 kHz. Zero TDM latency at 44.1 kHz and 48 kHz. At 96 kHz sample rate 2 milliseconds latency (0.002 seconds or 200 samples)
-Supported sample rates for RTAS, VST, AU, MAS and Audio Suite up to and including 384 kHz.

Typical Altiverb 6 XL TDM system usage examples at 48 kHz:

-mono to stereo Small Concert Hall with a 2.1 second reverb tail takes one HD|Accel chip.
-mono to stereo Large Concert Hall with a 4.2 second reverb tail takes two HD|Accel chips.
-mono to quad Church of 4.2 seconds takes four HD|Accel chips.

Altiverb 6 is a convolution reverb plug-in for Mac OS X and Windows XP. It uses top quality samples of real spaces to create reverb, ranging from Sydney Opera House to the cockpit of a Jumbo Jet. Altiverb 6 offers the most extensive set of parameters, it supports all professional plug-in formats including protools TDM on the Mac, parameter automation and surround. Altiverb 6 gives you a choice between iLok SmartKey or Challenge/response copy protection, it lets you sample your own spaces (currently Mac only), and Altiverb is efficient on your cpu.