Demodulating SAME FSK with audacity Part 1

Everything you ever wanted to know about SAME. Well, probably not everything. But we'll take a look at how to decode the signal using audio software which some might find interesting or one way to learn how your weather radio decodes the signal.
Even though i'm using an example from television (from the nationwide EAS test) this is also valid for transmissions over NOAA all hazards radio.
Music:
Kevin MacLeod - Local Forecast

[@danielletripkoff4199]

Welcome Back!

[@MidwestSirenProductions]

Glad to see you back!

[@utahsirens]

Holy shit you're back

[@guitarguy1985]

seemed appropriate as it's about the 10th anniversary of the channel (or i guess that was a couple weeks ago)

[@willyb7353]

Very informative! Thank you for posting!

[@zforce69]

Nice tutorial, thanks for this, it will be very helpful.

[@pangpengmaster]

Quality content right here!

[@goldpunk988]

I'm trying to decode some asfk and I can't seem to do the nyquist console absolute value step. Any workarounds?

[@goldpunk988]

nevermind, the workaround is "(snd-abs *TRACK*)" for those having the same problem.

[@chriskaprys]

@@goldpunk988 man, I thought that was going to do it for me, but still does nothing. I tried with *TRACK* as well as replacing that with the name of my track, but still does absolutely nothing. I think it has to do with newer versions of Audacity using different syntax in the Nyquist prompt, but I've googled everything I can think to google and come up with nothing. Thx anyhow ✌
edit: got it! it's: (s-abs * TRACK *)
(without the spaces between * and TRACK - new CZcams.)

[@minnesconsinsirens6803]

how would i generate fsk in multipsk?

[@jemussi7842]

Thanks for the video. I'm trying to get matlab to demodulate 4fsk WSPR symbols from captured audio. So far having trouble designing filters to distinguish between the 4 frequencies which are very closely spaced i.e less than 2Hz apart. Any idea how it's done? Having failed to achieve it using four seperate bandpass filters, I opted to try slope detection using only one filter after noticing the different frequencies came out consistently at different amplitudes. This sort of working but with errors. I have WSJTX which does it but not sure how as although open sorce, it's written mostly in fortran which I can't understand. Any tips appreciated.

[@michael040990]

Can you show us how to re-modulate the signal back to the original

[@umerk44]

Hi, The video is very helpful. Thanks for sharing. Please tell me how I can reach out to you?

[@bentolucian9471]

Good video

[@midoedo]

nice tutorial
Can I contact you ?