# pitches Structured representation of musical pitches, notes and intervals for for equal-tempered scale, A₄ = 440 Hz. [![ko-fi](https://ko-fi.com/img/githubbutton_sm.svg)](https://ko-fi.com/O5O31JYZ4) ## to do Support for other tunings (other base frequency for A₄). ## see also [Frequencies of Musical Notes, A4 = 440 Hz](https://pages.mtu.edu/~suits/notefreqs.html) [The Use of Cents for Expressing Musical Intervals](http://hyperphysics.gsu.edu/hbase/Music/cents.html)