Digital Performer is a full-featured Digital Audio Workstation

Digital audio workstation

A digital audio workstation is an electronic system designed solely or primarily for recording, editing and playing back digital audio. DAWs were originally tape-less, microprocessor-based systems such as the Synclavier and Fairlight CMI...

/Sequencer

Music sequencer

The music sequencer is a device or computer software to record, edit, play back the music, by handling note and performance information in several forms, typically :...

 software package published by Mark of the Unicorn (MOTU)

Mark of the Unicorn

Mark of the Unicorn is a music-related computer software and hardware supplier. It is based in Cambridge, Massachusetts and has created music software since 1984.Products by MOTU include:*Digital Performer*AudioDesk*BPM*MachFive*MX4*Unisyn...

 of Cambridge, Massachusetts

Cambridge, Massachusetts

Cambridge is a city in Middlesex County, Massachusetts, United States, in the Greater Boston area. It was named in honor of the University of Cambridge in England, an important center of the Puritan theology embraced by the town's founders. Cambridge is home to two of the world's most prominent...

 for the Apple Macintosh platform.
In 1984, Mark of the Unicorn

Mark of the Unicorn

Mark of the Unicorn is a music-related computer software and hardware supplier. It is based in Cambridge, Massachusetts and has created music software since 1984.Products by MOTU include:*Digital Performer*AudioDesk*BPM*MachFive*MX4*Unisyn...

 released Professional Composer, one of the first application programs for the Apple Macintosh. The program used the Macintosh's high-resolution graphics and printing to allow the user to print professional quality music scores.

In 1985, the company released a music sequencer

Music sequencer

The music sequencer is a device or computer software to record, edit, play back the music, by handling note and performance information in several forms, typically :...

 named Performer, also based on the Macintosh platform, for arranging and performing with synthesizers and other devices which recognized the then-newly developed MIDI standard.