onNotification for Audio CD return type unknown

Hello. When start playing Audio CD the xbmc.onNotification return:

Code:
{u'item': {u'type': u'unknown'}, u'player': {u'playerid': 0, u'speed': 1}}

I tried add to advancedsettings.xml this line but not help:

Code:
<musicextensions>
    <add>.cda|.cdda</add>
</musicextensions>

Is there a way to detect the playback of Audio CD