Sequencers: A software programs that is a MIDI recorder that captures MIDI data and can play it back in real time. It work by recording ON/OFF events along a timing grid that can be played back at any tempo. When you press Play on a sequencer, it simply sends the data back to the keyboard or drum machine, which plays it just like a real player. Because the keyboard or drum machine receives the exact same events that it sent when you played the track, it sounds exactly the same. If it doesn't sound like you want you can edit it on the screen.