This acid bass loop features a raw sawtooth oscillator running at 125 BPM over four bars, with a classic squelchy character shaped by a highly resonant 4-pole low-pass filter. The filter cutoff is modulated by a per-note envelope that decays faster and starts higher on accented notes, ranging roughly from 300 Hz up to about 2800 Hz. Pitch slides smoothly interpolate between notes, adding fluid glides, while a tanh distortion saturates the resonant peaks to add grit. The final sound is stereo, normalized to -3 dB, with a high-pass filter removing sub-mud and subtle fades in and out.
This loop suits acid house, techno, and other electronic styles around 125 BPM. It can be layered with drums and synths for a driving low end but may need careful EQ to avoid clashing with kick drums due to its rich midrange resonance. Adding subtle stereo effects or parallel compression can enhance presence without losing the characteristic squelch.