Music sequencer

A music sequencer (also MIDI sequencer or just sequencer) is software or hardware designed to create and manage electronic music. Originally, music sequencers did not include the ability to record audio. Instead, they only managed "remote-control" information (such as "note on" and "note off" events) to be sent to electronic musical instruments to produce the audio output. Most modern sequencers now feature audio editing and processing capabilities as well. Consequently, the terms "music sequencer" and "digital audio workstation" are often used interchangeably.
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