Acid bassline 128 bpm 4 bars C#

About this sample

This acid bassline features a buzzy sawtooth oscillator with a 16th note sequenced pattern at 128 BPM over 4 bars in the key of C#. The notes include slides achieved through linear frequency interpolation between steps, combined with accented steps that increase filter cutoff and resonance. A resonant acid tone is created by crossfading between multiple Butterworth band-pass and low-pass filtered versions of the sawtooth, controlled by a time-varying cutoff envelope. A clean sine sub-layer at half the frequency adds depth, while tanh distortion adds grit. The final sound is high-passed to remove low-end mud and normalized to avoid clipping, delivered in stereo.

This bassline suits electronic genres like acid house, techno, and trance, especially at 128 BPM. It works well as a driving rhythmic foundation and can be layered with percussive elements or pads for contrast. Watch for the resonant filter peaks in a mix, ensuring they don’t clash with other midrange elements or vocals.