Microphone input for measurement

[jabidof]

I'd like to use the microphone input for low frequency voltage amplitude measurement, e.g. DC. Does anybody have experience about this?

If you know about a perl module that control the mic input, let me know... :!:

Thanks

 

[throwaway18]

PC soundcard microphone and line inputs are capacitor coupled. You can't use them for DC measurements.

The frequency response of some models of soundcard is not very flat.

 

[jabidof]

Thanks! I had the hope i could turn the pc into a cheap A2D converter. I guess a microcontroller is the only way to go...

 

[tanveerriaz]

Sound card based multimeter

https://www.qsl.net/om3cph/sb/dcwithsb.htm

 

[bios]

yo, i'm new here and i'm doin project related to interfacing the mic or any musical instrument into my pc and i need to record the input waveform... anyone care to tell me...thx man!!

 

[echo47]

bios - do you simply want to record sound to a file? In Windows, you can use the built-in Sound Recorder utility.