Can I plug a TTL signal into the mic on my sound card?

Basically I want to trigger some LV code using an incoming 0-5 volt TTL signal.
And I was wondering if I could plug that TTL signal into my mic input and read the signal with the LabVIEW sound VIs.
But I'm unsure if I'll just end up frying my sound card.
I know I could buy a cheap NI USB DAQ board for $99 ... but I just want to get this done asap, and thought the sound card idea might work.
Any ideas?

A sound card is AC coupled. And has limited bandwidth. So I will say this is a far from optimal solution. What are you trying to do?
Sound cards are most often made for line-in signals levels. That is +/-1 volt. But this may vary from vendor to vendor.
Besides which, my opinion is that Express VIs Carthage must be destroyed deleted
(Sorry no Labview "brag list" so far)

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Can I plug a TTL signal into the mic on my sound card?

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