Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
피아노에서 반음은 두 음 사이의 가장 작은 간격입니다.pianoeseo ban-eum-eun du eum sai-ui gajang jag-eun gan-gyeog-imnida.A semitone on the piano is the smallest interval between two notes.