Just delay uninstalling the previous version until you’ve made sure the “latest and greatest” works for you.
You can have several versions of Ardour installed at the same time, they don’t interfere with each other.
I think ever since upgrading to 8.7, sometimes when I have Ardour open I get weird popping noises in other applications (opening pavucontrol = popping, opening MPV = popping noise, no audio). Ardour then itself actually stops outputting audio (it runs fine, but no audio comes out).
The audio interface I’m using is set to “Pro Audio” in pavucontrol. I’m using pipewire under the hood.
After I close Ardour, audio seems to fix itself. Any idea how to avoid this from happening?
Using the JACK backend of Ardour?
Which version of Pipewire? There are (or at least were until recently) frequent updates with fixes for various problems.
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pipewire version 1.0.5, I don’t think I’ve upgraded recently.
Yes, using JACK/pipewire with Ardour.
I noticed I have No Align blinking… trying to fix. Not sure if that could be the cause.
I believe that PipeWire versions 1.0.4 - 1.2.2 had some issues with Audio export when using the JACK backend, however this is probably nothing to do with your issue, to my knowledge version 1.2.3 is a current good one. NoAlign is indicating some kind of i/o loopback happening at Ardour’s output though and likely isn’t doing your signal flow any favours. If ‘qpwgraph’ is available in your repos to install it could help you visualize your signal flow and you could see what is interfering with Ardour and giving you the NoAlign warning.
This is the best maintained project with the greatest “customer support” 
Many thanks to all of you, very good work, indeed 
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