You need to add a "Sndio Input Client"  source,
Then manualy set snd/mon.
Obs has no automatic device list for sndio.

On October 12, 2026 11:56:58 AM GMT+02:00, vl <vl_ms@disroot.org> wrote:
>As described in https://www.openbsd.org/faq/faq13.html
>I enable audio recording with sysctl, create the monitor subdevice, and
>restart sndiod.
># sysctl kern.audio.record=1
># echo kern.audio.record=1 >> /etc/sysctl.conf
># rcctl set sndiod flags -s default -m play,mon -s mon
># rcctl restart sndiod
>but I'm confused on the next step - how do I configure obs to use the
>snd/mon device? When I open Settings/Audio all "Global Audio Devices"
>are empty. I have built-in azalia, one uaudio sound card, and uaudio
>headphones if it matters.
>