j variable outside of nbl scope

[MrBad]

Small issue on line 18 in https://github.com/berklee/nbl/blob/master/nbl.js
is .... i = j = 0, which makes j available globally (window.j in my case).
I suggest to declare it locally ... i = 0, j = 0,

[berklee]

You're right. Something to definitely fix in a new version!