Sanjay's Piano application

Click anywhere on the piano, then press keys on your keyboard to play notes.

Keyboard layout:

 a s   f g h   k l   ' 1 2   4 5   7 8 9   - =
\ Z X C V B N M , . / t Q W E R T Y U I O P [ ]

Options:

Filter keyboard notes: disallows keypresses that do not fit into the currently selected scale.
Filter MIDI input: blocks MIDI events from external source that do not fit into the currently selected scale.

Temperament

The tonal centre is the scale selected in the Scale tab.