Please note that with the release of the TDM version, Altiverb 6 does not contain an HTDM version anymore. And the TDM version only works with Pro Tools HD Accell gear.

This means that if you work on Pro Tools Mix hardware with Pro Tools 6.9 you will only be able to use Altiverb 6 RTAS. In this case the original Altiverb 4 or 5 HTDM version may be preferable for you, because in Protools 6.9 RTAS plug-ins are not allowed in master and aux busses.

For this reason Audio Ease will supply Altiverb 5 upon request to owners of Altiverb 6.