how do you record audible sound, and play it back as infrasound ?

An unusual task, I know nothing. I was told I need a heterodyne circuit.

oseriph05-24-2016 1:57am

erik_squires Details Discussions Posts This discussion Message User 15,630 posts 07-10-2016 at 03:45am Copy Comment URL Report Comment Edit Delete If this was on a file, you could use sox on Linux. It may even be able to use sox in streaming mode. Best, Erik