Ultimate Soundtracker

Ultimate Soundtracker, or Soundtracker for short, is a music tracker program for the Commodore Amiga. It is the creation of Karsten Obarski, a German software developer and composer at a game development company; sources differ as to the name of the company, Collins (2008) recorded it as reLINE, whereas Wright (1998) reported it as EAS.

Soundtracker started as a tool for game sound development for the Amiga. It was loosely based on the techniques developed by Rob Hubbard for the Commodore 64. The program allowed for four-channel hardware mixing on all Amiga computers, but unlike subsequent versions, limited the number of samples/instruments in a song to 15. It allocated the four channels in strict fashion: melody (lead), accompaniment, bass, and percussion. It could export the tracks as a sequence of assembly instructions.

Soundtracker was released as a commercial product in mid 1987. It did not enjoy success as a general music development software, with reviews calling it "illogical", "difficult" and "temperamental"; it was eclipsed in that market by programs such as Aegis' Sonix and Electronic Arts' Deluxe Music Construction Set. It became however a standard for games sound on the Amiga. The source code was released to the public domain, where it was hacked, debugged, and spread across the burgeoning Amiga underground. A disk of instrument samples (ST-01) was distributed together with the program. In 1989, the program was improved upon by two Swedish programmers, Pex “Mahoney” Tufvesson and Anders “Kaktus” Berkeman, who released a version known as NoiseTracker. Later versions of the program used the MOD file format, which stored both instrument samples and the tracks in the same file. These versions turned out to be incompatible with the Amiga OS 2.0, causing crashes. ProTracker was another successor, released in 1991, which solved the stability problems and made several changes to the user interface.