Single-mode: One key can play at a time. Press and hold your left mouse button to effect the duration of the sound.
Chord-mode: Press and hold the keyboard 'Ctrl/Cmd' button while selecting multiple keys with your mouse. Press 'Esc' to cancel selection.
Drag-mode: Press and hold the keyboard 'Alt' button while moving your mouse over the keyboard.
Interval memorizer is an online tool that will help you learn and memorize musical intervals. Associate intervals with reference songs, get suggestions from other members and build your personal interval song chart.