I only use a modest MIDI setup, and I'm by no means an expert. His explanations are very thorough, and pretty easy to follow. It's a great place to start if you're interested in MIDI, but are confused by it. It also has a ton of good recording tips, too. Using a Sequencer with a Drum Machine Drum machines add a curious twist to the setup.
Drum machines have an onboard sequencer, and can record their own patterns and songs.
In the previous examples, we've always had the drum parts programmed into the computer's sequencer program, but the isn't necessary with a drum machine. You simply program your drum tracks on the drum machine in pattern form, and then create a song with strings of these patterns. A typical pattern is somewhere between 1 and 4 measures long. I tend to use longer pattern lengths for more realism. With a pattern 4 measures long you can vary the drum hits a little throughout each measure which sounds much more interesting than repeating a measure 4 times.