Bluetooth source/sink

Hi all, I played yesterday a little bit with my mobnile phones and bluetooth. I tried connecting them as audio source. Both connect and interestingly I see in pavucontrol the phones as input and when I play music on the phone I see in pavucontrol the sound level indicator indicating there is music playing, but I can not hear anything. in windows it is working. I'm going to try ubuntu next. Do you have experience with it. Is it pulse problem or TDE audio problem? thanks