Music Macro Language (MML) is a music description language used in sequencing music on computer and video game systems.
An open-sourced scan of page 110 of Sharp Corporation's 1987 MZ-80 BASIC Manual, describing the origins of the MML syntax.
A music sequencer is a device or application software that can record, edit, or play back music, by handling note and performance information in several forms, typically CV/Gate, MIDI, or Open Sound Control, and possibly audio and automation data for digital audio workstations (DAWs) and plug-ins.
1980s typical software sequencer platform, using Atari Mega ST computer
User interface on Steinberg Cubase 6, a digital audio workstation with an integrated software sequencer
An analog sequencer
A step rhythm sequencer on the drum machine