Thank you. Setting the DLNA controller to "ignore transport events" helped somewhat, although the progress bar is still jumpy, and prone to fall behind. I guess this is the best that can be had in this respect.
Sorry for changing the topic, but would you happen to know why the DLNA server (JRiver) would stop playing all of a sudden, just by itself. This happened to me several times, during testing Auralic Aries. I may be wrong, but I think each time it happened with VERY short tracks (well under a minute). It's as if JRiver lost understanding of which next track it should push to the Renderer. Could it be because there is not enough time to communicate with the Renderer during short tracks?
Same two problems here with a new Aries Mini, although the sudden stops are not only on short tracks. Have contacted Auralic support and linked to this thread. I'm on a Mac, so I can't use Andrew's DMRA Tester, but I will try his suggestion to "Disable SetNext" and see if it helps and what that does to gapless play (would hate to lose it, was one of the main reasons for my purchase of the Aries Mini).
Update:
No luck so far. Checking "Disable SetNext" prevented JRiver from going to the next song completely. Not only weren't songs played gaplessly, at the end of the first song, playback is just stopped. With "Disable SetNext" unchecked, songs are played - gaplessly -, but the random sudden stopping persists. Could it be a buffering issue? The first answer of the Auralic support was "Try switching the Aries back to open home and see of it works with JRiver as the library." That's rather cryptical, so I asked for clarification.
I'm on the last version of JRiver for Mac 20 and JRemote 3.22. Tonight, I will try with the trial version of JRiver for Mac 21.