rolandtb - guyjbrown/bleepmanual GitHub Wiki
Roland TB303 Bassline (rolandtb)
Simulation of roland TB3030 bassline. Both saw and square oscillators are provided with variable level. You can use the square to thicken the sound, or detune it to make a sub oscillator. Add distortion and delay for the typical TB303 bass sound.
Author: Guy Brown
Parameters
| parameter | minimum | maximum | default | description |
|---|---|---|---|---|
saw_level |
0 | 1 | 1 | level of the sawtooth oscillator |
sqr_level |
0 | 1 | 0 | level of the square wave oscillator |
detune |
-2400 | 2400 | -1200 | detune amount of the square wave oscillator in cents |
cutoff |
20 | 10000 | 3900 | filter cutoff in Hz |
resonance |
0 | 25 | 5 | filter resonance |
env_mod |
0 | 0.95 | 0.4 | envelope modulation amount |
decay |
0 | 1 | 0.2 | filter decay time |
volume |
0 | 1 | 0.7 | master volume |
WebAudio graph
graph TD;
saw_id(["SAW-OSC:saw"])-->sawgain_id("VCA:sawgain");
sawgain_id("VCA:sawgain")-->mix_id("VCA:mix");
sqr_id(["SQR-OSC:sqr"])-->sqrgain_id("VCA:sqrgain");
sqrgain_id("VCA:sqrgain")-->mix_id("VCA:mix");
mix_id("VCA:mix")-->lowpass1_id["LPF:lowpass1"];
lowpass1_id["LPF:lowpass1"]-->vca_id("VCA:vca");
vca_id("VCA:vca")-->audio_id("audio");
ampenv_id[/"ADSR:ampenv"\]-.->vca_id("VCA:vca");
filterenv_id[/"ADSR:filterenv"\]-.->lowpass1_id["LPF:lowpass1"];