I am running the Mac version of Pigments 6. I have 3 audio devices: internal speaker, headphones, and HDMI out to a TV. I typically switch between headphones and HDMI out. My headphones have a built in mic and I leave them connected even when not selected.
When I open pigments, I get a little orange indicator in the menu bar indicating that pigments is using the mic. But if I switch audio devices (switch from headphones to HDMI or switch from HDMI to headphones), the orange indicator goes away. Pigments then no longer responds to any mic input. If I close pigments and reopen the mic comes back. This is more of an annoyance than anything else since I am able to recover the microphone.
I am not sure if this is an artifact of using a headset mic or if it would still happen with USB mics or mics connected via audio interface.