Making Music

There are several ways of making music in a tracker system.
You can either use complete mixed samples (loops) or you can use single
samples like basedrum, hihats, snare, cymbal etc...

If you want to use for example a drum loop you have to keep in mind that the
song bpm should match the loop bpm. Otherwise your loop will drift away.
There are serveral programs outside which can convert a sample from its
original bpm to another. (Steinberg ReCycle v2.00,eJay SoundBrowser)

A good commercial source for quality sample loops is the eJay Company.
Their SoundSelections 1-2 and the SoundCollections 1 - 5 contain license free
high quality samples from different ranges...dnb, techno, trance, latin...etc....
eJay.de

Also there are a lot of sites in the net which offer free samples