No, because the drive circuit for a speaker is the opposite of the circuit for a microphone. The output stage of a speaker amplifier is just that, an output. The only way to record audio from a speaker, which is totally possible, is to have also purposely built an input stage also attached to the speaker. Which at that point you might as well just use a microphone...

Audio input and output are not reversible.

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Y_Y 5 hours ago | parent | next [-]

I don't know what you mean here, I can plug a speaker into my mic slot and use that to record, just as plugging a mic into the speaker slot gives a (crappy) speaker.

	▲	cdaringe 5 hours ago \| parent \| next [-]
		> purposely built input stage You moved your device to the purposely built input stage. Not an expert, but your remark doesn’t compute with the parent comment
	▲	15155 2 hours ago \| parent \| prev \| next [-]
		A DAC and amplifier circuit is electrically incapable of processing input (on its own.) Physically unplugging and moving a speaker to a mic input works, sure, but very few devices can do this switching electronically.
	▲	Workaccount2 4 hours ago \| parent \| prev [-]
		Because on your computer the engineers purposely put a switch that can direct the signal to either the input hardware or the output hardware. It's not a mic slot, it's a general analog I/O port with a 3.5mm form factor.

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stragies 5 hours ago | parent | prev [-]

on many cards they are, check out the tool `hdajackretask` from package `alsa-gui-tools`.