Load your mastering software on your computer. Open a new track from the "File" menu at the top of your software window. Select "Audio" from the listings and then select "Stereo." Select the highest bitrate possible from the menu. Most software will go up to 24 bit, so choose this to get the best possible frequency output for radio.
Click the top of your screen and select the "File" menu on the top left-hand side of the screen. Under this tab select "Import" and wait for a small window to pop up. Locate your beat's audio file on your computer by searching through your files. Click your beat's audio file to import it into the new track on your mastering software.
Check your overload status by playing your track at the highest output possible before it goes into the red on your EQ. This will ensure that you are outputting the highest volume without overloading the speakers. Stay in the greens as much as possible throughout the whole track. If you go into the red, your track will rumble and pop on the radio.
Add a compressor to your master track from the "Plugins" menu at the top of your software window. This will compress the track so you have a uniform output in unstable areas of your song. If your software has a "Buss Compressor," choose that, although any compressor will work well.
Equalize your track accordingly. If your compressor has reduced your bass, treble or mids slightly, you can equalize the track to get a little bit more out of the song. A "Linear Phase EQ" is good for radio because it won't be as noticeable on the final track.
Go to the "Output" screen at the top of your software window. Lower the "Sub Sonic" frequency to above 30Hz. This will take most of the rumble out of the bass and will make your track stand out for the output of radio frequencies.
Use a "Multi Band Equalizer" from the "Plugin" menu to iron out any points in your track that have too much output. This tool will allow your to break up the track into segments and let you equalize certain points in the song that are too loud.
Finalize your track with a "Limiter" from the "Plugins" menu. A limiter will not allow your song to reach any obstructive output. This is a great tool for radio because radios vary in frequency output.
Edit the start and endpoints of the track by deleting dead noise. Select the dead noise with your cursor and hit the "Delete" button on your keyboard. Dead noise will ruin your track on the radio.
Click the "File" menu at the top of your screen and click on "Export". Export your track as an MP3 or an AIFF file according to your music library software. Itunes uses AIFF as its main music format but can also play MP3.