Interception microphone and send stream to another PC

Yes. This plays whatever signal comes in on your local microphone (or whatever is set as recording source) on another computer running FreeBSD: ssh otherpc "cat > /dev/dsp" < /dev/dsp

More control and better latency is possible with audio/pulseaudio. Unfortunately FreeBSD does not have a port of OpenBSD's sndiod(1) which would be even better IMHO.
 
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