SEQ is a audio project file created using PowerTracks Pro Audio software. PG Music Inc., developer of PowerTracks Pro Audio, offers lifelong support for SEQ format and publishes new versions of its software in one-year release cycle.

SEQ file can store both audio and MIDI tracks simultaneously. SEQ file editing is a very complex process and therefore the format is more suited for professionals. PowerTracks is a paid software and users can purchase the license on developers website.