Lulalib Turns JavaScript into a Music Score

Field notes

The library models music through composable JavaScript values: sections contain drum, bass, and lead tracks, while song arrangements combine those sections before export. The example uses a 120 BPM song in A minor, with a 909 kick pattern, acid-bass notes, and a saw-wave lead. The page says durations are represented as fractions and that the resulting Score can be serialized as JSON, while playback is kept outside the library’s core.