The Roland TB-303 Bass Line is a bass synthesizer with built-in sequencer manufactured by the Roland corporation from 1982 to 1984 that had a defining role in the development of contemporary electronic music.

The TB-303 (short for "Transistorized Bass") was originally marketed to guitarists for bass accompaniment while practicing alone. Production lasted approximately 18 months, resulting in only 10,000 units. It was not until the mid- to late-1980s that DJs and electronic musicians in Chicago found a use for the machine in the context of the newly developing house music genre.

In the late 1980s and early 1990s, as new Acid styles emerged, the TB-303 was often overdriven, producing a harsher liquid acid-like sound. Examples of this technique include Charanjit Singh's 1982 Ten Ragas to a Disco Beat,Phuture's 1987 "Acid Tracks" (sometimes known as "Acid Trax"), Hardfloor's 1992 EP "Acperience" and Interlect 3000's 1993 EP "Volcano".

In other instances the TB-303 was extremely distorted and processed, such as Josh Wink's 1995 hit "Higher State of Consciousness".

Roland (Frankish: Hruodland) (died 14 August 778) was a Frankish military leader under Charlemagne who became one of the principal figures in the literary cycle known as the Matter of France. Historically, Roland was military governor of the Breton March, with responsibility for defending the frontier of Francia against the Bretons. His only historical attestation is in Einhard's Vita Karoli Magni, which describes him as Hruodlandus Brittannici limitis praefectus ("Roland, prefect of the limits of Brittany") when narrating his death at the Battle of Roncesvalles, when the rearguard, under his command, and the baggage train of a Frankish army was beset by rebellious Basques.

Roland's death during retreat from the Battle of Roncevaux Pass in Iberia was transmogrified in later medieval and Renaissance literature. He became the chief paladin of the emperor Charlemagne and a central figure in the legendary material surrounding him, collectively known as the Matter of France. The first and most famous of these epic treatments was the Old French Chanson de Roland of the eleventh century. Two masterpieces of Italian Renaissance poetry, the Orlando innamorato and Orlando furioso, are even further detached from history than the earlier Chansons. Roland is poetically associated with his sword Durendal, his horse Veillantif, and his horn Oliphaunt.