As a part of my job at Robin I have been working with this Xcode project, which is a standalone iOS implementation of "Musical Fireflies":
http://www.uio.no/english/research/groups/fourms/downloads/software/musicalfireflies/index.html http://www.mn.uio.no/ifi/english/research/groups/robin/
libpd is used for audio synthesis and analysis: http://libpd.cc/get-it/
Work in progress