No, my soundcard only goes up to 20 khz I believe. However, I have a method to double it that gets me up to 40 khz.
I need to find out what khz any specific remote control operates on. To do this, I’d just point the RC at this ‘device’, bypassing a computer (if possible). Most remote controls operate at 38khz, but some go lower, some go higher - the method I’m using can’t emulate remote controls that go higher than 40 khz though, thus the need for testing to see what RC’s it’s possible on.
Sounds like it might not be easily doable though, since it’s unlikely anyone else has had to do something like this.
Edit: Found one!
That’s more or less what I’m looking for. Think I’ll just try to build one of those (or maybe just buy it)
You could scale down the frequency by 10 by using a decade counter to make the ultrasonic audible …
Frequency division (FD) bat detectors synthesise a sound which is a fraction of the bat call frequencies, typically 1/10. This is done by converting the call into a square wave, otherwise called a zero crossing signal. This square wave is then divided using an electronic counter by 10 to provide another square wave.