@jwz Reminds me of this exchange:
"Hey did you know they use Linux on the ISS?"
"Ah so that's why there's no sound in space."
@stewoconnor @jwz Hah! I ran Linux on that same laptop back in the day as my daily driver. Strangely, while living only a couple miles from Linus, and actually running into him at the grocery store every so often.
(He drove a Mercedes convertible paid for with Red Hat IPO money, license plate frame read "Mr. Linux, King of Geeks.")
why did I read that in Nick Cage nasal voice? Now I can't get rid of that imagination 
Ah yes...audio on linux.
Oh the joys at my former job on a system that was a RHEL base from top to bottom.
If lucky, issue was someone forgot to turn up a radio audio bar; otherwise, oh joy, something gone screwy either with audio driver, the sound control (note, this was custom desktop ingesting two headsets/mic setup for training combat air controllers), or one of the master audio servers went side ways.
What do the probes use it for? Seems like the utility of a mic is limited & the utility of a speaker is nil, but perhaps there are uses I haven't considered...