[aur-general] package submission

I have created a new package build for SVox Pico, a small speech synthesis engine, and I'm in the process of submitting it to AUR. I must choose a category on the submission page. SVox Pico consists of a library for producing speech output as well as a utility that converts text on the command line to a .wav file. Which category is most appropriate for such an application? Would lib be best, or is there something else that may fit better? ~Kyle