I have been using JRiver happily for years, having it on 2 networked PCs both capable of sending signal to my ultraRendu. I use PC "A" most of time for music playback. PC "B" is at a desk so I use it whenever I need to type a lot. I just bought a nice Brooklyn DAC and simultaneously got 6 months free Tidal HIFI (thanks to a tip here on the circle) and want to try MQA. Brooklyn sounds great - cannot get MQA to work, but that is not the problem. I installed Tidal and Linn Kazoo player (following directions from Sonore) on PC "B" and can get Tidal through Kazoo to play thru ultraRendu. Yesterday, using PC "B" I played the Replacements on Tidal thru ultraRendu - all working as desired. I did notice that if I left JRiver running on PC "A" the album cover and title from Tidal appeared - I liked that although I didn't understand it. OK. I turn off the Replacements on Kazoo on PC "B" and go sit down at main system and use PC "A" and JRiver to play something. After the first song the Replacements started playing and album cover and song title appear on JRiver on PC "A". I check PC "B" and Kazoo is not operating - that is how things should be. I turn off PC "B" and the Replacements still plays. I disconnect PC "B" from the router - the Replacements are still playing. I finally get that to stop by firing up PC "B", bringing up Kazoo and hitting Pause (there is no stop button) - this stops the Replacements. This morning I turn on both PCs, use PC "A" to play music thru JRiver. After the first song ends the Replacements again start playing although I have not used PC "B" for any music at all. Again I have to bring up Kazoo on PC "B" and hit pause to get it to end. WTF?