I have successfully built osgAudio on Mac OS 10.6 x86_64 with this:
#define FMOD_VERSION 0x00043205
revision of FMOD. A previous revision did not have proper support for 64bit builds on Mac.
Doug
Thanks, Doug. I made a note of this on the compatibility matrix at the wiki:
http://code.google.com/p/osgaudio/wiki/CompatibilityMatrix
--
-Paul Martz Skew Matrix Software
http://www.skew-matrix.com/