Hello,
I have a 2080TI , Pimax5k+ and a creative Sound Blaster ZXR.
When I launch SUPERHOT VR my framerate is 30-40fps. When I push volume buttons on the pimax, the framerate is 90fps and are still in 90fps until I release the volume button.
I can’t find anything on this issue on the net. Do you have an Idea of what shall I do to solve this issue ?
The game “To The Top” have exactly the same issue !
Very weird issue.
Can you try without the Sound card see if still happen and also what version of Pitool are you using mon ami ? 
Hello Jean-Mehdi;
I just tried but same issue occur 
In other words, the framerate is high while the volume overlay is visible?
Seems like it it, looks like we have real time frame rate adjustment (kidding).
I will try that when home. i am on 111 beta.
I tried Pitool 109, 111 and 112… Same Issue
Di you try changing sound device to windows for example and see it it does anything ?
I think you can disable sound on headset from Control panel/Sound .
It’s very weird… If I keep one of the 2 volume buttons pushed… I get 90fps all the time… If I release the button : 20-40fps 
Truc de fou sérieux 
Even if I disable my sound card ZXR on Windows, it still occur !
I precise that volumes buttons don’t work (no volume level screen appear) when I choose my sound card in primary on steamvr… But even if the volume screen don’t appear, when I push the button : 90fps !!
A workaround is to play with a scotch paper tape on the volume button to keep it running 90fps
Weirdest thing. I would try updating the USB drivers. 
I notice in EVENTVWR that I have some Perflib 2004 Error & 1008 warnings … It seems to be related…
All i can say is keep pressing Mate !!!
would be nice to be able to remap those buttons in software. I for one would bind them to recenter view. As i have different play areas
If somebody have an idea to solve this issue ! It would be great
Did you try contacting Doman to do a team viewer session in order to check your headset ?
I think this would be very helpful as it looks like something is not right.
I updated my NVIDIA drivers (419.67) and SteamVR was updated too (1.3.19) and my issue of low framerate is solved !
As updates were done simultaneously, I am not sure which of these two updates solved the issue.
(I just have my Pimax volume buttons that still don’t work to change sound volume … It was working well with my old PC Config with the same sound card and drivers)
Unfortunatly, the issue occur once again :’(
It seems to work when I lauch the games as administrator !