Mixxx is the only free cross-platform vinyl control software and has the most advanced MIDI/HID controller support.
Here is the official site where you can download it for free: http://www.mixxx.org/
This is mixxx's main window. Click on "Options" -> "Preferences".
This is the window that will appear.
You can either use mixxx's console or your hardware (for example http://www.hercules.com/en/DJ-Music/ ).
If you want to use your own hardware, firstly, you have to select the source of sound that you will use and then you should go to "Controllers", choose the type of the console and load it.
Now, go to "Live Broadcasting" to set up the server info.
To find the required information go to the homepage of your account in Radiojar some time before your show.
In the yellow box, under the "Broadcast link", there is all the information you need.
(In the same way you can use the Broadcast link of your station, if you are an administrator.)
Fill in the blanks with this information.
Fist, in the section "Type" select "IceCast 2".
In the section "Host" type the IP address which you can find at "HOST" of your Broadcast link.
In the section "Login" write "source".
Do the same for "Mount", "Port" and "Password".
Then, in the "Encoding" section select "Ogg Vorbis" at "Format" and "Stereo" at "Channels".
We recommend you to choose a Bitrate of 96kbps.
Don't forget to click on "Enable live broadcasting" before you press OK.
Now you are ready to broadcast!