I've been building ChordLens, a music theory app that shows you what you're playing on a piano in real time. Connect a MIDI keyboard (or use your computer keyboard), play some notes, and it identifies the chord and displays the notes on a grand staff. I also added scale highlighting, chord progression practice, a metronome, and automatic voice leading to experiment with different chord voicings. It's built with Flutter, runs on Windows, macOS, and Android, and is completely free and open source. GitHub: https://github.com/ErezLavi/ChordLens   submitted by   /u/No_Percentage_837 [link]   [comments]