Greiner Engineering Tools have announced 64 bit AAX support for Sum.mation the analogue summing box with automation. On their site they say;
We’re happy to announce that all of the sum.mation plugins are now available in 64 bit. AAX, Audio Units, VST - we’ve got you covered! And of course, as always, they’re free upgrades. For those of you who are hanging back a little from the bleeding edge, they’re all 32-bit as well (RTAS too). Head on over to the downloads page to get yours.