Demodulation

Using Nyquist scripts in Audacity.
Post and download new plug-ins.

If you require help using Audacity, please post on the forum board relevant to your operating system:
Windows
Mac OS X
GNU/Linux and Unix-like

Demodulation

Permanent link to this post Posted by Smoke_me_a_kipper » Fri Mar 02, 2018 5:02 pm

Hi,

I’m investigating an audio file which has some hidden info in it.
I think AM modulation was used, and the carrier signal is 20khz.
How would I go about demodulation / extracting the original (hidden) audio.

Hope this makes sense...
Smoke_me_a_kipper
 
Posts: 1
Joined: Fri Mar 02, 2018 4:50 pm
Operating System: OS X 10.11 El Capitan or later (macOS)

Re: Demodulation

Permanent link to this post Posted by Trebor » Fri Mar 02, 2018 9:36 pm

Smoke_me_a_kipper wrote:I’m investigating an audio file which has some hidden info in it.
I think AM modulation was used, and the carrier signal is 20khz.
How would I go about demodulation / extracting the original (hidden) audio.

If you look at the audio in Audacity's spectrogram view it will give you the demodulation frequency.
Trebor
 
Posts: 4319
Joined: Sat Dec 27, 2008 5:22 pm
Operating System: Windows Vista


Return to Nyquist



Who is online

Users browsing this forum: No registered users and 1 guest