This acid house bassline features a classic sawtooth oscillator filtered through a 4-pole low-pass Butterworth filter with a dynamic cutoff modulated by a decay-only envelope. Accented notes have higher initial cutoff frequencies, faster decay, and louder amplitude, adding punch and variation. The pitch slides smoothly between notes using exponential frequency interpolation, typical of 303 basslines. The sound is further shaped with hard tanh saturation for bite and harmonics, a high-pass filter at 30 Hz to remove sub mud, and a subtle stereo delay of 1.5 ms for width, all running at 124 BPM over 4 bars.
This bassline suits acid house, techno, and other dance genres at similar tempos, providing rhythmic and melodic movement with slides and accents. It works well layered with drum machines or synth leads but may need careful EQing to avoid clashing with kick drums in the low end. Adding parallel compression or distortion can enhance its presence in a mix.