Starbreeze Studios FastTracker is a music tracker (simply referred to as tracker) registered to Triton Production (Starbreeze Studios). It is a music sequencer software for creating and editing module files or arranging notes and sound samples from the module on a timeline using several monophonic channels. The screen interface in Fastracker has the pattern editor in the lower half, while the upper half of the interface has an instrument selector on the right, the general module settings, and some oscilloscopes. The interface also contains a pattern editor that can be switched to sample and instrument editor screens. The X1 file extension in Fastracker identifies the instrument used in the program, provides users with the capability to assign samples and vary pitches, and supports loop-enabled envelopes to control sound volume and stereo panning. Instrument generic settings include default panning, fine tuning, the starting note relative to C-4, and default volume. The minimum operating system is MS-DOS v.3, and the maximum is MS Windows 95. FastTracker is compatible with the DOS-32bit, DOSBox, Gravis Ultrasound like Covox, the Soundplayer of a PC Speaker, and Sound Blaster.