ofxAubio is an openFrameworks addon for aubio.
Fetch ofxAubio and aubio.framework from inside your openFrameworks root:
$ cd /path/to/of_root/addons
$ git clone git://git.aubio.org/git/ofxAubio/
$ cd ofxAubio
$ ./scripts/fetch_aubio_framework.sh
Select projectGenerator, select 'update project', then select the path of
example_aubioDemo, /path/to/of_root/addons/ofxAubio/example_aubioDemo.
Open example_aubioDemo.xcodeproject, drag aubio.framework into to it,
placing it in frameworks / 3rd party frameworks.
The home page of ofxAubio can be found at: https://aubio.org/ofxAubio/
Copyright (C) 2003-2015 Paul Brossier piem@aubio.org
ofxAubio is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.