All module-murphy-ivi source files are licensed under the GNU Lesser General Public License, as are the rest of PulseAudio source files. However, module-murphy-ivi optionally uses libdbus, which is licensed under GPL. If you enable D-Bus support for module-murphy-ivi, module-murphy-ivi needs also to be distributed under GPL. However, if D-Bus support is not enabled, the module can be distributed under LGPL. See file COPYING for details.