I had it resting a year.
But now i have started work upon it, it is a sequenser with roots in early.sequencers like Cubase.

If someone manage to make a tune and save it, i would be happy to incorporate it. send file to
jonas.thornvall@hotmail.com
It is 100% vanilla javascript so do not expect to much.
It is online and hosted at github, try it.

The editor is flaky but you can click notes on canvas to select event, and easily adjust standard parameters, even rudimentary copy and paste.
See URL for link