Made between 1982 and 1984, the Roland TB-303 is an analog bass synthesizer capable of producing sequenced bass lines. Originally intended to accompany studio musicians in place of a bassist, it soon found a different use providing the squelching bass lines of acid house music, particularly due to its transistor-based resonant low-pass filter. With a DIN Sync24 input, CV/Gate functionality, and a unique step sequencer with slide, swing, and accent functions, the Roland TB-303 creates an unforgettable and unique bass sound.