[Freeswitch-users] bad ringback tone if I use OPUS

Hi All, for outbound calls I have configured following two lines in the dialplan: <action application="set" data="ringback=%(2000,4000,440.0,480.0)" /> <!-- or <action application="set" data="ringback=%(1500,3000,425)" /> witch the same result --> <action application="set" data="instant_ringback=true" /> For the G711 and the G722 Codecs the ringback works fine but with the OPUS codec there is a bad noice after the first ringback tone hearable. This problem is veryfied with Bria 4 and the ICE Link Stack Have anyone an idea? Thanks a lot!