Much finer groove control

[ural]

I think it's important to maintain the open flexible functionality of the groove column.

e.g. For creating long slow phasing sequences, the current groove settings don't work, 

you already can do almost all Raich's "phase" pieces on Nerdseq easy. I think for phasing you should use "short" and simple sequences what become complex because of phasing. then it is easy to catch that simple melody and how it changes.