Unlike Half Life DJ, SLAM allows you to play Mp3 files and has an easy to use graphical user interface. Now people use a free program called Source Live Audio Mixer which works with CSGO, CSS, and TF2.
In previous versions of Counter Strike you could use a program called Half-life DJ however since the release of Global Offensive this program does not work anymore. Usually, a soundboard will have a theme to them however with CSGO it will be whatever sounds you have downloaded. A soundboard allows you to play custom-made sounds through your microphone, a popular example of this would be the Mario “coin” sound or music.
Many fun times can be had by playing Counter Strike: Global Offensive with a soundboard.