[weedwacker]

Originally Posted by GRC

Thanks for all those - the only one I've tried 24-bit activities with is Audacity, and that seemed to want to output everything in 16-bit...... see a previous thread of mine for the details.

You need to specifically specify the output in the preferences under the uncompressed export format. Even though the option when doing so will say export as wav it will export it as aiff if the option is set as such and also as 8/16/24/32 bit depending on how you set it. You may have to use other to get signed 24 bit but it is definatelty an option in that list for aiff.