Hm, find some samples and use a sequencer or something bro
What do you use to put your tracks together?
I'm using this program called Mixcraft, which is like a Garageband for windows.
Most of the included "virtual instruments" are sampled and pitched altered, so they sound close to the original. But some (that require additional length or vibrato if you extend the note's count) are obvious synths and sound artificial.