Performance-ready bass synthesizer with authentic sound and intuitive controls engineered to play that is based on the wildly influential TB-303 model. It features Analog Circuit Behavior (ACB) technology that allows part-by-part analyses and faithful recreation of tonality and behaviour of TB-303, as well as faithful recreation of the original saw and square oscillator waveforms and authentic filter behaviour with smooth response and classic sound, and reproduction of attack, slide, tie and other elements (including their interaction). Synthesizer provides 134 captivating sounds (including the original tones and new four-oscillator, effects-processed basses, leads and sound effects), controlled via pressure-sensitive touch pad, dedicated Tempo control with shuffle and tap tempo functions, and smooth, responsive knobs for built-in effects control. Device is equipped with 7-segment, 3-character LED display and 16-step indicator lights to aim in pattern creation, and also provides seamless switching between pattern creation and performance, pattern support for up to 32 steps and easy access to shuffle control for bass lines. It further allows entering steps manually or recording them in real time on the touch pad, changing step count during playback to alter the length of the phrases, random pattern generation and pattern modification, plus pattern copy function.