Direct mp3 download or play: 433 Megahertz
I made this recording using my Airspy software defined radio with a small ground plane antenna, suitable for UHF (with 2 additional VFOs, all very wideband AM) and VSTHost. The VST plugins used were Argotlunar, MFreqShifter, DtBlkFx, Sanford Reverb, and LoudMax. Think of the VFO (variable frequency oscillator) tuners as tracks, except instead of microphones and musical instruments there are radio signals. There was some additional audio processing done in Adobe Audition for restoring some dynamic range and adding fades at the beginning and ending. I don’t believe my modest Windows 10 computer could have done a screen capture in real time with all of the processing already happening, so I made a short screen capture video (without additional audio processing) of the signals that can be received. This video shows SDRSharp (the software that runs Airspy) running with the main VFO tuner set to 433.873 megahertz with the only audio option as mono, left and right. Aux VFO tuner number 1 is set to 433.905 megahertz, left channel and Aux VFO tuner number 2 is set to 433.950 megahertz, right channel. The auxiliary VFO tuners are operating extremely wideband AM 40,000 kilohertz with squelch at 37. The main VFO tuner with the settings not visible is at the maximum bandwidth of 32 kilohertz with the same squelch setting.
Direct mp4 download or play: 433 Megahertz
What are we hearing? I’ve found a variety of links that explain.
Wikipedia LPD 433
Using 433 MHz for wireless connectivity in the Internet of Things
433 MHz interference – causes?
SIGIDWIKI.COM – Signal Identification Guide – 433 MHz
Nazi Mind Control 433 Megahertz Radio Frequency
8 users commented on " 433 Megahertz "
Follow-up comment rss or Leave a TrackbackThat sounds fantastic, Weatherman!
Thank you, Rich. I’m learning more about what these software radios can do. Consider how it might be able to be incorporated into a live performance. For example, all of the “Boopers” I’ve built will generate radio waves which could be received and processed as an effect. I also believe that most circuit bent devices likely also generate radio frequencies.
I like the sounds of appliance remote controls when shot at a device like an electric guitar pickup, especially if it’s going into a lot of effects. They’re all rather unique sounding. Could they also be picked up by a radio antennae?
The video in this post is the 433 megahertz signal “dry” with no effects. Here are a couple of YouTube videos that may answer your question. By the way, check out some of the other videos on that YouTube channel.
https://youtu.be/L5YfxoZa9AY
https://youtu.be/Uso7srVOquE
Sounds great David. You could probably make some really cool ambient with some of the sounds that happen on shortwave.
I wish shortwave reception was better. There is a tremendous amount of radio frequency noise from the neighborhood on shortwave. VHF and UHF are much better providing lower noise and overall better reception. Even AM broadcast is plagued with quite a lot of interference. FM is quite good with a fairly strong signal from CBC Radio 2 at 92.1 megahertz. I think the transmitter in on Vancouver Island.
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I now live on the side of a hill overlooking central-east Vancouver (clear line of sight of Mt St. Helens!) and you wouldn’t believe how congested 433-434 MHz is here on a typical day. I should record some audio and send it to you one of these days to play with/alter/analyze/whatever. Working 462/467 MHz FM here can be a lot of fun, even on a little Yaesu HT.
And shortwave’s pretty much shot here too. Not only is there a high school full of noisy computer equipment a few steps away from this apartment complex, and an adjoining neighborhod full of more of the same, and high-voltage Bonneville distribution lines nearby yet, but there’s two major AM stations (KKOV & KPAM) about a mile away to throw a few harmonics onto shortwave for good measure.
Nobody pumping music into modded baby monitors here (yet). Hmm, may have to change that situation one of these days. By the way I did manage to track down the guy who was doing that in Cascade Park last year and it was indeed an RCA line-in mod that he was feeding from the Muzak service on one of the SES-3 Ku transponders (Tp. 12? Been too long.). Gave me some ideas that given my vantage point, I really want to try and implement maybe next summer.
Anyways Mr. Waetherman, thanks for this & have a good christmas.