BubbleUPnP and Pause/Next track

[Alandbush]

(16-07-2020 20:48)jchoatejr Wrote:  Unless I run across something specific my next move will probably be to download and install TuneBrowser as a renderer and then see what happens.

I use Tunebrowser most often and have not seen the 501 message. You should be ok. But then again, I don't use it to alter volume.

The author of Audiophile Renderer admitted that it does not have volume control in response to someone getting the 501 message whilst altering volume via BubbleUPNP. I'll make a wild, wild guess that Audiophile Renderer does not fully implement all UPNP actions which results in the 501 message when they are actioned.