Sharing interface input between Ardour and OpenSoundMeter

#1

Hey everyone,

i’m building a live FOH setup with the following specs:

  • Behringer X32 (serves also as audio interface 32i/o)
  • Ardour for track recording / virtual soundcheck
  • OpenSoundMeter for SPL measurement

I thought that with pipewire i could use one X32 input for the measurement-microphone and route that to OSM instead of Ardour. But for some reason i can’t get this working. In patchchance the two (OSM/Ardour) arenot shown at the same time.

I’m quite sure it’s user error so any help is appreciated.

OR is there even a plugin that can be calibrated to SPL inside Ardour?!?

#2

I don’t know OpenSoundMeter, but I expect this should be possible with either JACK or pipewire (and pipewire’s JACK emulation). As for what the issue is, we need more information.

  • Are you getting Ardour from ardour.org or your distro? Which version of Ardour?
  • Do you use Ardour’s JACK/pipewire backend?
  • How does OpenSoundMeter connect to the system? Is it a JACK client?

If you’re using some 3rd party repos that sandboxes the app (flatpak, AppImage, etc) that that may cause issues.

Do you mean patchage? If you’re using pipewire try helvum or qpwgraph instead.

1 Like
#3

I found GitHub - psmokotnin/osm: Open sound meter. FFT based application for tuning sound systems. and on Linux it directly uses ALSA, which requires exclusive access to the device.

So to uses it with pipewire, you need to install the pipewire-alsa bridge, and configure that.

2 Likes
#4

First of all, thx for the fast reply and taking the time searching!!

Yeah, the github is right. I got the app from their official site though. And yes, it’s an AppImage.

Will try your pipewire-alsa bridge suggestion and report back.

Adressing the other questions in case of need.

Sorry, typo. I meant “Patchance”,the pipewire patchbay that UbuntuStudio ships with.

Ardour 8.12. as binaryfrom Ardour.org

Yepp, switched to the JACK/pipewire backend.