2052 UNID on 1646 (via Twente SDR), DJ in D and parts of music, 2058 OFF
2058 UNID on 1647 (via twente SDR), weaker station, talking (other voice)
edit : from Achim, that other station was R. Vrolijke Mijnwerker
later : 1646 is back (on the waterfall)
Sounds like a QSO