How to play more than one track at a time?

[pvanosta]

My system:
Synology NAS 1513+ with BubbleUpnp and Minimserver installed
Control point software: Lumin or Linn Kinsky
Streamer/renderer: Oppo 105 via ethernet

It took me a while to find my way around Minimserver and Bubbleupnp etc., but I really like the Lumin app when pointed to Minimserver. It streams all file formats in native resolution etc.

However: it will only ever play a single track.

When I point Lumin to 'Diskstation' (the synology DLNA client I am assuming), I can click on the same track and play will continue until the end of the album. The problem is that that client does not play hi-rez files at native rez. It reduces everything to 16-bit according the Lumin display.

So: how do I get Lumin/Minimserver/Bubbleupnp to play more than one track at a time please?

Thanks