Click a square to add a note to the pattern; click again to remove it. To quickly clear the matrix, click a square on and off and then press the Space key.
for this tonematrixURL that you can use to share this performance via email or website postings: (Select All, then Copy)
Tonematrix specification: (can be shared with other Tonematrix implementations using Copy/Paste) Change or paste new specification then press "Set Tonematrix" to establish a new matrix all at once.