No sound from apps on phone through soundbuds

I have just brought sound buds and paired to Samsung phone. I can hear ring tone through them so sound works but no sound from other apps. When I play bbc sounds I can start/stop with controls on buds but no sound. When I turn off buds it plays from my phone so not a problem with phone/app. I have disconnected and reconnected multiple times. Do I need something else on my phone to play apps through Bluetooth connection?