The music, which was the first collaboration between Carlos and her partner Annemarie Franklin,[3] featured a mix of an analog Moog synthesizer and a Crumar General Development System (GDS) digital synthesizer.
The non-electronic pieces were performed by the London Philharmonic Orchestra (hired at the insistence of Disney, which was concerned that Carlos might not be able to complete her score on time).
[citation needed] Shortly before the release of Tron, Walt Disney Productions replaced the second part of the ending title's score with the song "Only Solutions".
[6] For years, the soundtrack was unavailable on CD, originally due to a dispute between Carlos and CBS Records.
Chiptune artists 8 Bit Weapon released an 8-bit music tribute to the original Tron soundtrack.