The Lua library Modest allows users to explore musical harmony through various tunings beyond the traditional 12-tone equal temperament. Users can define scales using a notation system that incorporates steps of different sizes (large, small, medium) and experiment with microtonal frequencies and intervals. The library connects to collaborative resources such as chord and interval libraries, enhancing the ability to use creative musical structures in an accessible programmatic way. Comments highlight potential usages for norns users and dive into aspects of chord identification and expression in music programming.