LMMS ships LB-302, a built-in monophonic synth that imitates the Roland TB-303 acid architecture

LB-302 is a synthesizer built into LMMS (no extra install) described in the manual as ‘an incomplete monophonic imitation of the TB-303’ — the Roland bass synth whose sound defines acid. Like the original it is monophonic and built from a VCO (waveforms: saw, triangle, square, square with rounded end, moog-like, sine, exponential, white-noise) feeding a 24dB/oct VCF with cutoff, resonance (RES), envelope modulation, and decay (DEC), plus a distortion section and Slide, Accent, and Dead controls. ‘Incomplete’ flags that it does not perfectly reproduce the hardware, but it captures the acid-defining parameter set. Because it is bundled, a learner can study the TB-303 voice — oscillator into resonant filter, shaped by a sequenced envelope with accent and slide — without external plugins or hardware.

Examples

In LMMS: add an LB-302 track, program a Piano-Roll sequence with some accented notes, raise the VCF resonance, and modulate/automate the cutoff to get the classic acid ‘wah’. Slide ties adjacent notes; accent emphasizes selected steps.

Assessment

Name the core signal-path elements of the LB-302 (oscillator, resonant filter, envelope with accent/slide) and identify which element produces the ‘wah’ of acid bass. How does Accent differ from simply increasing a note’s volume?