Altiverb is not a TDM plug-in, and doesn't use the DSP on TDM cards, so it doesn't face the same limitations that TDM reverb plug-ins face. Altiverb is a sampling reverb. If you like a particular hardware reverb algorithm, you can do an impulse response and sample it. I've only had Altiverb for about two months and haven't explored all it can do, but it's an incredible tool, especially for simulating lush, real spaces. Lee Blaske