Download and install some beat-making software. Hammerhead Rhythm Station is a completely free computer program that allows users to create endless amounts of beats for free. Fruity Loops and Beatcraft also offer excellent beat making software, but only offer free trial versions of their software and will require the user to eventually pay to use the software.
Click on a channel to select it and then click the dropdown box inside the channel to select an instrument sample to assign for the channel.
Click on the empty boxes in the music time line to assign beats for the first channel. Clicking will trigger the channel to play the specified sound sample at that specific moment in time upon playback.
Press the "Space" bar to play back the beat. Press "Space" again to stop playback.
Assign different instruments to each of the channels to create the beat.
Click "File" and then click "Stream to disc" if using Hammerhead, then click the buttons "WAV" and "Whole Session." Pick a file name for the beat and press "OK."
Press the "Space" bar to begin playback. The beat will be saved to the file. When finished press "Space" to stop playback and recording.