 One of the earliest synthesizers to be employed in acid music was the Roland TB-303, which makes use of a resonant low-pass filter to emphasize the harmonics of the sound.Big beat is a term employed since the mid-1990s by the British music press to describe much of the music by artists such as The Prodigy, Cut La Roc, Fatboy Slim, The Chemical Brothers, The Crystal Method and Propellerheads typically driven by heavy breakbeats and synthesizer-generated loops and patterns in common with established forms of electronic dance music such as techno and acid house.Also sometimes known as atmospheric breaks, progressive breaks (or "prog breaks") is a subgenre of breaks that is essentially a fusion of breakbeat and progressive house.