I'm using the DVBLink TV Backend which also provides radio services from Sat and Cable. Please see my signature for Hardware setup. So I think it's DVB Radio service then. (I thought DVB is Digital VIDEO Broadcast where DAB is audio on that way)
Up to KODI 14.x everything worked as expected, since introducing 15.x it broke up. For me, it seems to be a caching issue. Depending on the bitrate of the radio station, stuttering is more or less frequent. Maybe Kodi is not aware of different bitrates in that case?
Log is showing these warnings/ errors:
12:43:38 T:18446744071674819584 DEBUG: CDVDPlayerAudio::HandleSyncError - average error -34791.258190 below threshold of 50000.000000
12:43:38 T:18446744071674819584 DEBUG: CDVDClock:
iscontinuity - CDVDPlayerAudio::HandleSyncError2 - was:27490425126.063892, should be:27490390336.159698, error:-34789.904194
12:43:39 T:18446744071674819584 WARNING: CDVDMessageQueue(audio)::Get - asked for new data packet, with nothing available
Other users are able to solve this problem temporarily by pausing the stream some seconds and resuming it. This sometimes also works for me but not always. But I think this can not be the final solution.