I have worked with a few software examples.
For those wondering. The Windows
program software, I use is called "The Big Picture" Look it up
on Google for different types and
other fun NBTV instruments with some great historic vibe.
As you can tell from the screenshots. The
video quality of NBTV is not that great. But it works indeed and
can be used with "audio" not just with ham radio HF rigs. You
NBTV over an analog phone line as a proof of concept. Or record a clip to a cassette audio. You can even go as far as "printing" the NBTV audio waveform onto a
I tried this on an old HF ham radio. I had
no direct audio mic "line" input. So I was able to open up radio
mic and modify it with the addition of an external mic wire.
This is a quick and "dirty" fix. If your audio is too low or too high you may need to change the input impedance. From low to
high or vice versa. If you don't have ant fancy audio type of transformers or fancy box. You can scrap just about any old AC mains wall mount transformer. As such.