/n_fill                    Fill ranges of a node's control value(s)

int - node ID
[
  int or string - a control index or name
  int - number of values to fill (M)
  float - value
] * N

Set contiguous ranges of control indices to single values. For each
range, the starting control index is given followed by the number of
controls to change, followed by the value to fill. If the node is a
group, then it sets the controls of every node in the group.