Reading 3.5mm volume/freq

[filipd]

Would this work?

I am trying to read any data from a 3.5 TRS jack. I could check analogRead every x miliseconds and get data. Is there anything wrong or misunderstood?

[johnft]

You may find this of interest:
http://www.instructables.com/id/Arduino-Audio-Input/?ALLSTEPS

[Grag38]

very interesting web link.

Thanks a lot !