RCA Mark II Sound Synthesizer by Herbert Belar and Harry Olson at RCA, a room-filling device built in 1957 for half a million dollars.

Punch tape system for earliest studio synthesizers.

Music roll for pneumatics system - utilized on player pianos (using piano rolls), Orchestrions, several mechanical organs, etc.

Book music (since 1890) for pneumatics system - utilized on several mechanical organs.

Metal disc with punched holes (late 18th century) - utilized on several music boxes such as Polyphon, Regina, Symphonion, Ariston, Graphonola (early version), etc.

Barrel or cylinder with pins (since 9th or 14th century) - utilized on barrel organs, carillons, music boxes.

The following are specifically designed to function primarily as the music sequencers: Many synthesizers, and by definition all music workstations, groove machines and drum machines, contain their own sequencers. ( October 2011) ( Learn how and when to remove this template message) Unsourced material may be challenged and removed. Please help improve this article by adding citations to reliable sources. This section needs additional citations for verification.

2.2.5 Integrated software studio environments.

2.2.3 Tracker-oriented DAWs with MIDI sequencers.

2.2.2 Loop-oriented DAWs with MIDI sequencers.2 Software sequencers and DAWs with sequencing features.1.7.3.3 MIDI sequencers with embedded sound module.1.7.2 Proprietary digital interfaces (pre MIDI era).1.6.3.1 Button-grid-style step sequencers.1.6.1 Embedded self-contained step sequencers.1.5.2.2 Analog-style MIDI pattern sequencers.

1.5.2.1 Analog-style MIDI step sequencers.1.5.1 Analog sequencers with CV/Gate interface.

Mulab 7 sequence editor