Freesound Forums

Hi everyone,

Recently I found this website:

http://websdr.ewi.utwente.nl:8901/

On this page you can listen to and control a short-wave receiver located at the amateur radio club ETGD at the University of Twente. In contrast to other web-controlled receivers, this receiver can be tuned by multiple users simultaneously, thanks to the use of Software-Defined Radio.
You can make recordings of the signal you recieve and download them after that.
Here are a few examples:

http://www.freesound.org/people/escortmarius/sounds/240551/
http://www.freesound.org/people/escortmarius/sounds/240552/

Because of different influences on the radiosignal like the sun and weather conditions the signal is changing all the time, also differences in day and night across the globe change the activity.
It is a very rich source for sounds, specialy the weird space/spy/horror kind of sounds that I like a lot!
I would like to know if there are more websites or other sources like this... anyone any suggestions??

Awesome finding!!

Speedenza wrote:
Great find - thanks!

There's a big list of other online SDRs here: http://websdr.org/

I haven't tried many of them - most of them require Java.

What a great time to be alive!

Edit:
The one at http://hackgreensdr.org:8901/ is definitely worth a listen (they've got a much bigger antenna) though it doesn't seem to have an audio record function so you'll need to manually patch it if you want to capture samples. It's java only so you may have to add the URL to your java security settings. [Configure java (java control panel) | Security tab | Edit site list etc]

Escortmarius,
http://websdr.ewi.utwente.nl:8901/
is absolutely fantastic! - in fact, it may even compete with Freesound as my main source of sounds online

The frequency waterfall display is also amazing.
When you are on the site keep an eye for lines that cross the frequencies on a diagonal left to right, slightly curved - those are atmospheric phenomena. The sound of the Earth's atmosphere itself... Well, not sound... more like electromagnetic interactions between solar wind and Earth's magnetic field... but you get what I mean.

Also look out for light horizontal lines covering a huge frequency bandwidth. You can hear them as slight pops or bursts of noise - I believe these are caused by lightning.

There are all sorts of amazing sounds there.

Also listening to transmissions using an incorrect bandwidth, especially if also slightly out-ot-tune with the station produces wierd and wonderful sounds.
Using the FM setting on AM stations (again, out of tune with the actual station) is another source of interesting sounds. Altough less easier to predict and to control than the above.

http://www.awi.de/en/research/research_divisions/climate_science/observational_oceanography/oceans_acoustic_lab/palaoa/palaoa_livestream/

Headphaze wrote:
http://www.awi.de/en/research/research_divisions/climate_science/observational_oceanography/oceans_acoustic_lab/palaoa/palaoa_livestream/

I have been at this website before. Found here here once on a Freesound post, but then could not find it again.
I was hoping someone would re-post it on this thread...
I was right!

This is also amazing. Can listen to this for hours.

You are most welcome!

Its kind of creepy, I like it.

The websdr site is unreal, heard some really weird stuff. I like the way you can 'see' it. The sounds from under the ice are quite spooky too. Good finds, thanks for sharing

I heard there is a website in which you can select the location to stream audio from, since there are a number of stations around the world running perpetually.

I don't know the address for this site though, which is a pity.

Headphaze wrote:
I heard there is a website in which you can select the location to stream audio from, since there are a number of stations around the world running perpetually.

I don't know the address for this site though, which is a pity.

I have been looking around a little if i could find more, but there are hundreds of websites you can listen to shortwave radio.
If you google on online shortwave radio there is enough for a whole lifetime of listening!!
Some websites also have recordings of special broadcasts or some only have recordings of broadcasts.

escortmarius wrote:
I have been looking around a little if i could find more, but there are hundreds of websites you can listen to shortwave radio.
If you google on online shortwave radio there is enough for a whole lifetime of listening!!
Some websites also have recordings of special broadcasts or some only have recordings of broadcasts.

Thanks for the sentiment, although that's not what I'm looking for. I'm after a website which gives the option to stream from any one of many hydrophone stations that are recording the earth's oceans. I remember a university classmate of mine showing it a few years back, but I can't remember the location exactly.

Headphaze wrote:
...I'm after a website which gives the option to stream from any one of many hydrophone stations that are recording the earth's oceans...

Is it this one?
http://listentothedeep.net/acoustics/index.html

@Headphaze.. I didnt realise you were searching for hydrophone stations...
Seems that Speedenza found at least something similar, but after visiting the website I am a little confused...
Is there always so much noise in the ocean??
I never listened to a hydrophone before... but I dont think I would like being a fish...

escortmarius wrote:
I have been looking around a little if i could find more, but there are hundreds of websites you can listen to shortwave radio.
If you google on online shortwave radio there is enough for a whole lifetime of listening!!
Some websites also have recordings of special broadcasts or some only have recordings of broadcasts.

Beware that there are actually 2 very different things here:
One is a recording made in the studio - which could be very high fi.
The other is the capture of radio transmissions (which of course you can record).

The later comes with all the typical shortwave noises and interferences, while the former does not.

escortmarius wrote:
Hi everyone,

Recently I found this website:

http://websdr.ewi.utwente.nl:8901/

On this page you can listen to and control a short-wave receiver located at the amateur radio club ETGD at the University of Twente. In contrast to other web-controlled receivers, this receiver can be tuned by multiple users simultaneously, thanks to the use of Software-Defined Radio.
You can make recordings of the signal you recieve and download them after that.
Here are a few examples:

http://www.freesound.org/people/escortmarius/sounds/240551/
http://www.freesound.org/people/escortmarius/sounds/240552/

Because of different influences on the radiosignal like the sun and weather conditions the signal is changing all the time, also differences in day and night across the globe change the activity.
It is a very rich source for sounds, specialy the weird space/spy/horror kind of sounds that I like a lot!
I would like to know if there are more websites or other sources like this... anyone any suggestions??

Here is a site that let you listen to a lot of countries radio stations searchable down to what city the station's in.

http://tunein.com/

@Speedenza - YES that is the one! you are a star, thank you.

@escortmarius - I believe the reason for the white noise is the amplification of the audio. It is probably needed in order to pick up faint signals from the surrounding ocean. The hiss is the low signal to noise ratio of the preamps used to capture.

Here is my fresh soundpack consisting recordings from http://websdr.ewi.utwente.nl:8901

http://freesound.org/people/Trebblofang/packs/14815/

Very interesting and rich source. Expect more recordings in "Shortwave" pack.