Hopefully, this article will help start you on your way to music sequencing and electronic music in general. While most modern sequencers support both MIDI sequencing as well as Digital Audio recording, this article will focus only on MIDI.
First, we'll start off with some of the basic terms used in MIDI sequencing. While this is not a comprehensive glossary, it should be enough to get you started, and make you feel more comfortable in your sequencing environment.
Controller (MIDI Controller): A MIDI Controller is a device (usually a keyboard) that you play on to generate MIDI information, while many keyboards provide both the controller and sound source, it is not necessary for these to be contained in the same device.
Controller (Controller Data): This is a type of MIDI event generally used to indicate the position of a knob or slider. These can control volume, pan, pitch bend, effect levels, or other settings available on the MIDI device.
Event (MIDI Event): This is anything that is sent through MIDI. These include notes, controllers, pedals, or anything else that can be transmitted through MIDI.