Mic doesn't work with Nacon Revolution Pro - Any fixes out there?

Just got a Nacon Revolution Pro, and I love it, but it seems the mic doesn't work at all (I'm using the standard PS4 pack-in earbud/mic). Has anyone encountered this?

Per some recommendations I found online, I've gone into device settings to bump the mic sensitivity up all the way up... no luck. I can hear game audio through the ear piece, so the connection is there, but nothing is getting picked up by the mic. It's not on mute, the same mic DOES work with the dual-shock, and I've tried unplugging/replugging several times.

I suppose it's possible the controller is broken and I should get it replaced, but I thought I'd check to see if anyone has had a similar experience first. Any advice?

Thanks in advance.

(EDIT: formatting)