For anybody interested in working with gigaverb~ by Olaf Mathes, you can find a 64 bit version (for macos) of the original external here: http://vboehm.net/downloads/ The updated sources can be found here: https://github.com/v7b1/gigaverb

I know there is gen~.gigaverb in the max-examples folder, but it is not exactly the same and sounds a little different. Also, the gen~ version naturally needs a little more cpu power. if you run into problems, please let me know. vb