An (optimized) implementation of the music DR measurement (compliant with http//dr.loudness-war.info/), it supports CUE sheets and is faster than all currently available alternatives (at the time of writing, not sure about now)
A Kotlin JVM project to make use of both rules and AI power to collect information about music from the Internet. See https//github.com/czyczk/auto_music_info for the Flutter client.
musical_note KeyTools is a library that allows you to convert musical keys between notations. In addition, KeyTools allows you to calculate matching keys for harmonic mixing.