Okay, here’s some further playing.
Bubble UPnP will display the metadata for a track. This shows that, regardless of ‘viewing mode’, the track number and track title are correct. In ‘ByFolder’ mode, it sorts by title. In ‘Artist/Album’ mode, it sorts by track#. The metadata fields are title, album, artist, track#, duration, year, genre & stream ID (encoding type, length, URL)
UPnP Monkey allows you to set which field is used to sort, offering title, album, artist & track#.
UPnPlayer sorts by track# in both views.
Kinsky sorts by title in ‘ByFolder’ view, and by track# in ‘Artist/Album’ view.
My conclusion, therefore, is that Twonky is providing the correct metadata for tracks, and it’s down to the DMC/DMP to decide which metadata field is used to display track order. And it looks like UPnP Monkey is the most versatile of the UPnP apps I’ve tried, in this respect, since it allows the user to control the sort order.
