https://www.pressport.com/us/news/tags/piano-keyboard-scale-major-minor-music-theory-sing-play-pitch-4981

Piano, keyboard, scale, major, minor, music, ...

Press releases

Do not sing out of key!

Press release January 14, 2015
New app ScaleCoach helps you sing and play on key

Piano, keyboard, scale, major, minor, music, theory, sing, play, pitch