Transposer is software that enables the musician, or non-musician to automatically transpose chords from a song to whichever key (s)/he might desire.
This is a javascript re-interpretation of an existing project that I had made a long time ago in a galaxy far away. And then later on re-implemented with my son as a co-author.
The original Transposer project
Clone and execute:
cd transposer
npm install
npm test
npm start
Now, simply point your browser to "localhost:3000"
See the docs folder for design ideas