Harmonic interval

This exercise is one of the exercises you can use to practise intervals. The concept is pretty simple: You press the ''New interval'' button to play a random interval, and then you should tell what interval it was.

Key bindings

Minor second: 1Perfect fourth: 2Major sixth: 3Minor ninth: 4
Major second: qDiminished fifth: wMinor seventh: eMajor ninth: r
Minor third: aPerfect fifth: sMajor seventh: dMinor decim: f
Major third: zMinor sixth: xPerfect octave: cMajor decim: v